And he describes two sources for building the love that can fight against inevitable, and all too human, destructive aggression.

FORBES: Newtown Is Why You Should Bring Einstein And Freud To Your Holiday Gatherings

Should respect for the rights of human beings become the predominant objective, then injustice, ill-temperament, aggression and war will fade away.

NPR: Transcript of Ahmadinejad's U.N. Speech

He questions why the idea of human nature has become a taboo subject, exploring "hot buttons" like violence, gender and aggression.

BBC: Aventis science prize 2003 - Pinker