But now we are preparing for an era of cooperation, and it occurs to our men of science to go back to nature and find out what really are her ways. If you will read Kropotkin's "Mutual Aid as a Factor in Evolution," you will find a complete refutation of the old bourgeois biology, and a view of nature which reveals in it the germs of human morality. Kropotkin points out that everywhere throughout nature it is the social and not the solitary animals which are most numerous and most successful. There are many millions of ants and bees for every hawk or eagle, and certainly in the state of nature there were thousands of deer for every lion or tiger that preyed upon them. And all these social creatures have their ways of being, which it requires no stress of the imagination to compare with the tribal customs and the moral codes of mankind. The different animals prey upon one another, but they do not prey upon their own species, except in a few rare cases. The only beast that makes a regular practice of exploiting his own kind is man. By hundreds of interesting illustrations Kropotkin shows that mutual aid and mutual self-protection are the means whereby the higher forms of being have been evolved. Insects and birds and fish, nearly all the herbivorous mammals, and even a great many of the carnivores, help one another and protect one another. The chattering monkeys in the treetops drove out the saber-tooth tiger from the grove because there were so many of them, and when they saw him they all set up a shriek and clamor which deafened and confused him. And when by and by these monkeys developed an opposed thumb, and broke off a branch of a tree for a club, and fastened a sharp stone on the end of it for an axe, and fell upon the saber-toothed tiger and exterminated him, they did it because they had learned solidarity--even as the workers of the world are today learning solidarity in the face of the beast of capitalism.