Have not prisons — which kill all will and force of character in man, which enclose within their walls more vices than are met with on any other spot… - Peter Kropotkin

Once a German jurist of great renown, Ihering, wanted to sum up the scientific work of his life and write a treatise, in which he proposed to analyze the factors that preserve social life in society. "Purpose in Law" (Der Zweck im Rechte), such is the title of that book, which enjoys a well-deserved reputation.
He made an elaborate plan of his treatise, and, with much erudition, discussed both coercive factors which are used to maintain society: wagedom and the different forms of coercion which are sanctioned by law. At the end of his work he reserved two paragraphs only to mention the two non-coercive factors — the feeling of duty and the feeling of mutual sympathy — to which he attached little importance, as might be expected from a writer in law.
But what happened? As he went on analyzing the coercive factors he realized their insufficiency. He consecrated a whole volume to their analysis, and the result was to lessen their importance! When he began the last two paragraphs, when he began to reflect upon the non-coercive factors of society, he perceived, on the contrary, their immense, outweighing importance; and instead of two paragraphs, he found himself obliged to write a second volume, twice as large as the first, on these two factors: voluntary restraint and mutual help; and yet, he analyzed but an infinitesimal part of these latter — those which result from personal sympathy — and hardly touched free agreement, which results from social institutions.

The hospitality of primitive peoples, respect for human life, the sense of reciprocal obligation, compassion for the weak, courage, extending even to the sacrifice of self for others which is first learnt for the sake of children and friends, and later for that of members of the same community — all these qualities are developed in man anterior to all law, independently of all religion, as in the case of the social animals. Such feelings and practices are the inevitable results of social life. Without being, as say priests and metaphysicans, inherent in man, such qualities are the consequence of life in common. But side by side with these customs, necessary to the life of societies and the preservation of the race, other desires, other passions, and therefore other habits and customs, are evolved in human association. The desire to dominate others and impose one's own will upon them; the desire to seize upon the products of the labor of a neighboring tribe; the desire to surround oneself with comforts without producing anything, while slaves provide their master with the means of procuring every sort of pleasure and luxury — these selfish, personal desires give rise to another current of habits and customs.

The resources of science, both in enlarging the circle of our production and in new discoveries, are inexhaustible. And each new branch of activity calls into existence more and more new branches, which steadily increase the power of man over the forces of nature.