16. Worldwide deaths from battle have plunged from 300 per 100,000 people during World War II, to the low teens during the 1970s, to less than 10 in the 1980s, to fewer than one in the 21st century, according to Harvard professor Steven Pinker. "War really is going out of style," he says.
22. According to the Census Bureau, the average new home now has more bathrooms than occupants.
31. The average American work week has declined from 66 hours in 1850, to 51 hours in 1909, to 34.8 today, according to the Federal Reserve. Enjoy your weekend.
42. Adjusted for inflation, the average monthly Social Security benefit for retirees has increased from $378 in 1940 to $1,277 by 2010. What used to be a safety net is now a proper pension.
47. According to AT&T archives and the Dallas Fed, a three-minute phone call from New York to San Francisco cost $341 in 1915, and $12.66 in 1960, adjusted for inflation. Today, Republic Wireless offers unlimited talk, text, and data for $5 a month.
The full 50...