Barking dogs occasionally bite, but laughing men hardly ever shoot.
Whenever we find, in two forms of life that are unrelated to each other, a similarity of form or of behaviour patterns which relates to more than a few minor details, we assume it to be caused by parallel adaptation to the same life-preserving function.
I have found the missing link between the higher ape and civilized man; it is we.
There is indeed the possibility that the evolutionary process has, in gray antiquity, bred into us an excess of aggression.
'I don't need brains,' says the billionaire contemptuously. 'I'm brainy enough myself!' The broker cries out in desperation, 'What, in heaven's name, do you want?' 'Goodness,' is the answer.
I grew up in the large house and the larger garden of my parents in Altenberg. They were supremely tolerant of my inordinate love for animals.
Practically all animals which move fast in a homogeneous medium have found means of giving their body a streamlined shape, thereby reducing friction to a minimum.
Ethologists are often accused of drawing false analogies between animal and human behaviour. However, no such thing as a false analogy exists: an analogy can be more or less detailed and, hence, more or less informative.
I believe that present day civilized man suffers from insufficient discharge of his aggressive drive.
Most of the vices and mortal sins condemned today correspond to inclinations that were purely adaptive or at least harmless in primitive man.
In the course of evolution, it constantly happens that, independently of each other, two different forms of life take similar, parallel paths in adapting themselves to the same external circumstances.