Two fundamental factors are at the base of this transformation. The first is the destruction of those religious, political, and social beliefs in whi… - Jean-Jacques Rousseau

Let us conclude that savage man, wandering about in the forests, without industry, without speech, without any fixed residence, an equal stranger to war and every social connection, without standing in any shape in need of his fellows, as well as without any desire of hurting them, and perhaps even without ever distinguishing them individually one from the other, subject to few passions, and finding in himself all he wants, let us, I say, conclude that savage man thus circumstanced had no knowledge or sentiment but such as are proper to that condition, that he was alone sensible of his real necessities, took notice of nothing but what it was his interest to see, and that his understanding made as little progress as his vanity. If he happened to make any discovery, he could the less communicate it as he did not even know his children. The art perished with the inventor; there was neither education nor improvement; generations succeeded generations to no purpose; and as all constantly set out from the same point, whole centuries rolled on in the rudeness and barbarity of the first age; the species was grown old, while the individual still remained in a state of childhood.

Every person has a right to risk their own life for the preservation of it.

[T]he man who meditates is a depraved animal.