““Thus by an unprejudiced observation of the animal kingdom, we reach the conclusion that wherever society exists at all, this principle may be found: Treat others as you would like them to treat you under similar circumstances. And when we study closely the evolution of the animal world, we discover that the aforesaid principle, translated by the one word Solidarity, has played an infinitely larger part in the development of the animal kingdom than all the adaptations that have resulted from a struggle between individuals to acquire personal advantages.””