A Factor of EvolutionMutual Aid: A Factor of Evolution Peter Kropotkin 1902 Chapter 1: MUTUAL AID AMONG ANIMALS Struggle for existence. -- Mutual Aid -- a law of Nature and chief factor of progressive evolution. -- Invertebrates. -- Ants and Bees -- Birds: Hunting and fishing associations. -- Sociability. -- Mutual protection among small birds. -- Cranes; parrots. The conception of struggle for existence as a factor of evolution, introduced into science by Darwin and Wallace, has permitted us to embrace an immensely wide range of phenomena in one single generalization, which soon became the very basis of our philosophical, biological, and sociological speculations. An immense variety of facts: -- adaptations of function and structure of organic beings to their surroundings; physiological and anatomical evolution; intellectual progress, and moral development itself, which we formerly used to explain by so many different causes, were embodied by...
True Civilization. Warren, Josiah Boston, Mass. PREFACE. The present condition of our country, and of many other parts of the world, calls out and places before us, as in a panorama, whatever there is of thought; whatever there has been of progress or retrogression, and displays to us at a simple glance, as it were, the present state of civilization in so vivid a manner that we are enabled to weigh and estimate what we have and what we need with a degree of certainty that, in a state of repose, no one's lifetime might enable him to measure; and which may reasonably inspire even the humble with a boldness suited to the time, and with a hope that discoveries indispensable to true civilization, that could scarcely gain a single ear while the adversities of life could be borne, may now receive some attention where all confidence in the tried is lost. TABLE OF REFERENCE.