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.
Further reading
BRD 1924 & 1925
External links Ethics: Origin and Development by Pëtr Kropotkin at the Anarchist Library