All behavior patterns can in principle be altered by environmental intervention. The fact that currently we can alter some patterns and not others is a problem of knowledge and technology.
David Buss, The Evolution of Desire: Strategies of Human Mating, New York, 2003, p. 17
[O]ur virtues and our vices may be traced to the incidents which make the history of our lives, and if these incidents could be divested of every improper tendency, vice would be extirpated from the world.
William Godwin, Enquiry Concerning Political Justice, London, 1793, bk. 1