Who is Jeremy Bentham?

Jeremy Bentham (1748-1832) was an English philosopher who founded the philosophy of Utilitarianism. Utilitarianism is a system of principles which evaluates actions based on their outcome. Utilitarianism sought to create happiness for as many people as possible. Bentham was not exactly defining happiness in the Jeffersonian sense of people seeking to have everything they wanted, but he defined happiness in terms of maximizing pleasure and minimizing pain. Humans, he believed, were motivated by the pursuit of pleasure and the avoidance of pain.
John Stuart Mill, a Utilitarian philosopher and feminist, promoted Bentham's ideas after his death. Bentham, a radical who did not believe that the bestowal of liberty and rights depended on the government, had little influence during his lifetime.
Bentham's mummified body, whose original head has been replaced by a one made of wax, currently sits in a hallway at the University College London where it has been since 1850, at his request.
http://www.slate.com/blogs/atlas_obscura/2013/10/23/jeremy_bentham_died_in_1850_but_he_s_still_sitting_in_a_hallway_at_this.html