## I. INTRODUCTION I assume that each life on earth is generated by evolution. Of course, this assumption is not provable. Some questions about the properties of animate beings are discussed. Basically, I ask how such a thing as 'evolution' can create the properties, for instance, people who have an interest in mathematics. ## II. PREJUDICES In the first question, I talk about prejudices. I believe that the property that people have prejudices is innate. Of course, I cannot prove it. A funny example is from the German comedian Johann König. In his show, he described the situation: 'Imagine that you return at home, and there is a lion in your flat.' Even if you never had bad experiences with a lion, you see the claws and teeth, and you will be cautious. This is a good decision! The animal could be dangerous. Although there are friendly lions, it is better to be suspicious and to be careful. This prejudice may save your life. I think that prejudices are inborn, since for millions of years they have been useful, even though it has had consequences for a few wrong decisions. It helps us to act as fast as lightning. Of course, today some prejudices may not be suitable for a modern life. ## III. BOOZE Everybody knows the effect of alcohol. The production of wine or beer has been a part of human culture for thousands of years. Beer may has been an important food in the past. Also, it was a beverage of high quality, instead of water, which often was polluted. The human liver has the ability to deteriorate the alcohol, but only ethyl alcohol $(C_{2}H_{5}OH)$, while the related methyl alcohol $(CH_{3}OH)$ is toxic. Fortunately, by the fermentation, the fungi produce nearly always ethyl alcohol. From where does come the difference? This means I ask why the liver can deteriorate ethyl alcohol, but not methyl alcohol. The speculated answer is that people have eaten fruits in autumn. The fruits often had fallen down. They often have started the fermentation process already, i.e. they have contained some alcohol. Those who could digest the fermented fruits have survived, the others perhaps died of hunger. This property was handed to the next generation. Thus, people can digest some ethyl alcohol, but not a bottle of vodka each day. Finally, they detected the positive effect of alcohol, and they invented the ability to generate a fermentation. ## IV. ACORNs AND BEECHNUTS In this chapter, I discuss the question of why oaks and beeches have relatively big fruits, i.e. acorns, and beechnuts, compared to willows or poplars. Big fruits need a large amount of material. The question is, why do these trees invest material into the production of big fruits? In my opinion, the answer is animals. The Eurasian red squirrel (Sciursus vulgaris) and the jay (Garrulus glandarius) use acorns and beechnuts as a winter store. The German names ('Eichhornchen' and 'Eichelhaher') advert to this fact. Of course, they prefer big fruits. They stockpile up to 1000 stores in the autumn. The animals remember most of them, but some they forget. From these forgotten buffer stocks new trees grow. In this way, these trees accrete. Therefore, evolution pressures to produce bigger fruits. In contrast, willows and poplars need the wind to spawn. ## V. MATHEMATICS Some people have a talent for mathematics. A part of them likes it, too. For instance, the German mathematician Gauß started in his youth to deal with mathematics. I ask, why evolution has generated people which like mathematics, although the possible application would be in the future. I estimate that less than one percent of the created mathematics is exerted. Hence, people do not know whether their mathematics will be used or not. Anyway, these people can not be deterred from keeping busy with mathematics. Why has evolution done that? The possible answer lies in the past. Many years ago, the Stone Age people often starved. Some people have begun to make loops as a form of hunt to trap animals. In this way, they perhaps have survived, and their genes were preserved. Those who did not have the ability to do so have died. Making loops is a very complicated procedure. You have to anticipate what happens if an animal steps in the loop. This requires a lot of abstract considerations. (Apart from that, it was a horrible death for the trapped animal. It may last hours or even days until death has put it out of its misery). I have gotten the idea in a hospital. I have lain there in a room with a few television sets without sound, to not disturb the others. To hear the sound, there were two small tannoy's. First, you had to put the tannoy's with two cables in the plug socket. Sometimes it has happened that the two cables were knotted. At this time, I was not able to unbraid them without the aid of others. I believe that putting loops was a clever way to hunt, for those who could do so. This was perhaps a decisive way for survive. This would explain the joy of some people about abstract thinking. ## VI. SEX Bacteria spawn by cleavage. For them, one sex is sufficient. Why generally, in highly developed animals, there are two sexes? The answer is, of course, the rearrangement of the genes. When animals accrete, the genes are stirred. Hence, the fact that there are two sexes is clearly superior to only one sex. It makes an evolution possible. Some people have the opinion that there is a third sex. I believe that this is nonsense since there is no reason for evolution to generate that. ## VII. SWEAT In the times before farming a decisive way for Stone Age people for survival was a successful hunt. I imagine that youngsters early began to exercise the hunt. One requirement was the ability to run. The body overheats easily. The evolution generated perpiratory glands. The hunter could transpire and in this way, he or she could cool down. Therefore, the hunter could run longer, and this resulted in a more successful hunt. Perhaps the evolution of perpiratory glands was a crucial development for survival. ## VIII. SUGAR AND SALT In this chapter, I deal with the fact that generally, people like sweet and salty food (usually not together, except in ketchup). The answer to the first is that nearly all sweets are healthy, with one possible exception of honey. Of course not now, but millions of years ago, only in autumn you got sweets in the vegetable form of fruits. In those times without cookies and chocolate, there was nearly only one possibility to eat sweet things. You had to gather ripe fruits in autumn. On some rare occasions, you have found a beehive, and you were able to eat honey. You probably got some painful bee stitches, but this you put up. When you live near the coast, the supply of salt is no problem. Your food contains enough salt. The difficulties start when you settle afar from the coast. It might be a problem to get enough salt. For a successful hunt you need salt since when you sweat, you lose not only water, but also salt (NaCl). Therefore, evolution has developed an appetite for salty food. ## IX. HOMOSEXUALITY This chapter contains ideas that are not mine. I have read them anywhere. Here I ask why homosexual people exist, although they do not accrete. The answer is that groups of people are more peaceful if a minority of people is homosexual. For a man, another homosexual man is no threat since he knows that the other man would not try to steal his wife. The same holds for women. Life was so hard in the Stone Age that survival was only possible in a group. This has required some social behavior since it was important to regard other persons as fellow campaigners and not as rivals. One way was a common dance or to make music together. A book that broaches the issue of this is [1]. I assume that the genes which make the person homosexual are not only at the homosexual persons, but also at other members of the group. ## X. PEDOPHILIA This chapter deals with the phenomenon called 'Pedophilia'. I will only give a justification that it may be genetically determined. I do not consider the difference of power between an adult and a child; what is more, I will not take up any position. One million years ago a child played anywhere, monitored by two persons (usually the parents). They did their best to protect the child, but they couldn't see everything. Behind every bush could hide a lion, prepared to kill and eat the child. The probability of survival increased significantly when a third person looked after the child. The third person may be an uncle or an aunt. Or it could be a completely foreign person, who fell in love with the child, or it has only a sexual interest in it. The same situation without the lion can happen today, but I believe that the probability of survival would change hardly. Similar to the previous chapter, I presume that the genes which make a person pedophiliac are not only at the pedophils, also at other members of the group. # XI. NAILS Probably you are a neat person and cut your nails regularly. This is necessary since the fingernails and toenails grow. In this chapter, I ask why this is necessary. Why do the nails grow faster than they are worn off? The answer is that the speed of growth is just the right one. Of course not now, but in the Stone Age life was so hard that the nails grew as quick as they were worn off. I speculate that the speed of growth was just the right one. Now they grow to fast. ## XII. OCEANS AND RIVERS The number of species in rivers and lakes is nearly twice as large as the number in the sea, although the area is smaller. The reason for this may be that salty water is not a good precondition for life. Freshwater perhaps is more suitable for the generation of new species. ## XIII. MIGRATORY BIRDS Some birds are migratory, for instance, the White Stork (Ciconia ciconia). Others are stationary, for instance, the Greenfinch (Chloris chloris). Why has evolution done that? It seems, that any migration is a 'disadvantage' since it is a dangerous journey. I believe that in the beginning there were no migratory birds since in the north the weather conditions were as bad as today. But the animals have learned that even in the north during the summer the temperatures are pleasant. Those who could migrate, i.e. the birds, have learned to fly in warmer areas in winter. In summer, they fly back, to raise their offspring since in the warmer climate also there is more food. I believe that finally this knowledge has gone into the genes. Some birds have learned to handle the harsh weather conditions in winter, and for them, there was no reason to migrate. They kept to be stationary. ## XIV. WITCHES In the Middle Ages, the Christianity was very intolerant. It was a common practise to burn people on the stake, if they were aspersed to be in league with the devil. Mostly the victims were female. For instance, the mother of Johannes Kepler, the man who have found that in space two celestial bodies move around each other in ellipses, was accused to be a witch. Fortunately, her son managed it to absolve her from the accusation. Burning 'witches' makes happy. Not the witch, of course, which suffered a horrible death, but the others probably felt good. Perhaps mostly they have thought 'God is very fair. The bloody witch gets what she deserves'. Some have felt pity with the 'witch', but they did not show it since this has been dangerous. It was better to hide the emotions, otherwise perhaps they were accused to be in league with the devil, too. ## XV. CHIMPANZEES It is well-known that chimpanzees are social animals. Furthermore, their children are very cute. Some researches were confused as they detected that also chimpanzees are effective and successful hunters. They hunt and eat smaller apes. Some chimpanzees remain on the ground to cut of any escape way, others go into the treetop to hunt and kill the prey. After a successful hunt they brotherly share the poor victims with those apes who have remained on the bottom. In this way, the chimpanzees get flesh, what normally is impossible since mainly they eat plants. It only works because the apes cooperate, and they are intelligent animals. The chimpanzees have learnt that cooperation increases their personal abilities enormously. I believe that finally this property has gone into the genes; or, in other words, evolution has taught them this capability since those who did not have the competence to be social died out. ## XVI. MILK Some Asian people can not digest the lactose in milk. A great part of the European people digests it without problems. The ability to drink milk has been a big advantage when people started livestock breeding. Their survival no more depends on a successful hunt. This means, they could have more children since they had a constant supply of food. Of course, in this day and age, this ability is not of great importance since few people starve, and mostly people do not depend on livestock farming. ## XVII. WAR War is regarded as a big problem among human societies. Many attempts were made by politicians to solve problems between states. Some remain unsuccessful. I believe that to risk one's life is a very social action since life is the most important thing we can give. To sacrifice the own life for other people, maybe the 'crown', or the 'nation' or the believe or something else is a very social act. This distinguishes us from animals. Generally animals do not risk their own life for others. ## XVIII. MEDICAL SCIENCE Fortunately, in many human societies there are medical care. For instance, I would not live anymore without it. On the other hand, we are products of an evolution. Medical science is the contrary to evolution. Nature kills someone who has an anomalous behavior or appearance. It is cruel and merciless. Nearly all creatures suffer a violent death. It is very rare that animate beings die of senile decay. Evolutionary progress comes by death, although it would suffice to exclude them from reproduction. ## XIX. CUCKOOS The cuckoo (Cuculus canorus) is a well-known migratory bird. It is famous for its call and infamous since the just hatched birds throw eggs and other birds out of the foreign nest. If they survived the fall, they die of undercooling. This policy is a clever way to accrete, so long as the major part of the birds pursue a different way. I believe that evolution has created these conditions, although this strategy seems to be 'mean' for a social thinking human. ## XX. ENEMIES Enemies are important. For a human, the idea of something very evil is helpful. An enemy image makes happy. The imagination of the 'ill' helps to distinguish between the 'good' and the 'bad'. This common belief generates a feeling of togetherness. For instance, Adolf Hitler considered the Jews as 'bad'. Having an enemy image is a general property of human beings, made by evolution. ## XXI. SPIDERS Nearly all people find spiders disgusting. Both the slowly, hairy ones and the quick ones. I strongly believe that it is innate since animals like butterflies evoke sympathy. Why has evolution done this since in Europe do not live dangerous spiders? This is a hint that people did not develop here (It is only possible to live in Europe when you have a heat source, because of the foul weather), but in a region where dangerous spiders exist, for instance, in Africa. ## XXII. THE PEACOCK PARADOX In this chapter, I mention peacocks (Pavo cristatus), and magpies (Pica pica). Even Darwin wondered about the 'Peacock Paradox'. Male peacocks have a beautiful embellishment, while female peacocks wear an inconspicuous plumage. The solution of the paradox is that female peacocks choose the males to breed. Of course, they prefer the most eye-catching males. Also magpies are conspicuous birds. They are the most beautiful birds in Germany with its salient white and black feathers and a long tail. It is the contrary to a camouflage. Females look similar to males. I don't know why. Perhaps at magpies the appearance is not genetically connected with the sex. ## XXIII. CORRUPTION AND CRIME In this chapter, I deal with the question why the government can not stop corruption, although it causes heavy damage to a human society. The answer is that corruption is advantageous both for someone who gets money for any service and for somebody who receives anything. Therefore, corruption presents itself more as a social act than a crime. I believe that this behavior is generated by evolution since it has an advantage for both. Of course, today the government has to continue to fight against it since in a our society it generates more damage than benefit. Also, delinquency will not disappear since to commit a successful crime has an advantage for the criminal. ## XXIV. FASCISM Two famous dictators have behaved similarly. Both il Duce (the leader) Benito Mussolini and der Führer (the leader) Adolf Hitler stood above and gave speeches, while many others were below and hailed the speaker. I believe that this is more a social act than a wrong behavior. People unify behind a seemingly wise leader. He (generally the leaders are male) promises to lead them into a bright future. I think that this behavior is innate and it is generated by evolution. The leader makes all important decisions; some are terrible. Unfortunately the leaders mostly are not 'wise'. They like to have power. It ends in a dictatorship instead of a bright future. I believe that the majority of people is not suitable for democracy. ### AFTERWORD As I have already said in the Abstract, the above notes are my personal opinions. Therefore, I have abstained from giving more references. Further, I always made an effort to write as briefly as possible. ### ACKNOWLEDGEMENTS I thank Gavin and Jana Crosby for information, and as well as Bouchra Ben Zahir for a careful reading.

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