@booklet {321331, title = {Graphic evidence: Steven Pinker{\textquoteright}s optimism on trial}, journal = {The Guardian}, year = {2015}, abstract = {Every year the eminent psychology professor updates the 100 graphs that appeared in his 2011 book The Better -Angels of Our Nature, showing that every form of violence is in decline. Here are his latest findings.}, author = {Steven Pinker} }