Why Are Men So Violent? The Male Warrior Theory Debunked

http://m.psychologytoday.com/blog/experiments-in-philosophy/201202/why-are-men-so-violent

"In a recent book, Steven Pinker documents a radical reduction in violence with the rise of democracy and global trade, a comforting confirmation that social factors matter....

I think Pinker's optimism may be overstated: global trade has done less to remedy the poverty that devastates lives of people outside the economic partnerships between wealthy nations; healthy trading relationships can lead one nation to overlook the human rights abuses in another; and there have also been dozens of attempts at genocide since the Second World War."