Ėtika

**Ethics: Origin and Development** is a book by Peter Kropotkin, published posthumously in 1921. It continues the argument of Mutual Aid, that sociable morality is essential to human survival. It was translated into English by Louis S. Friedland and Joseph R. Piroshnikoff in 1924. (Source: [Wikipedia](https://en.wikipedia.org/wiki/Ethics:_Origin_and_Development))