the greatest period in world history

Expanding on my belief that everything is amazing and nobody is happy, here are 50 facts that show we're actually living through the greatest period in world history.

1. U.S. life expectancy at birth was 39 years in 1800, 49 years in 1900, 68 years in 1950, and 79 years today. The average newborn today can expect to live an entire generation longer than his great-grandparents could.

4. In 1949, Popular Mechanics magazine made the bold prediction that someday a computer could weigh less than 1 ton. I wrote this sentence on an iPad that weighs 0.73 pounds.

5. The average American now retires at age 62. One hundred years ago, the average American died at age 51. Enjoy your golden years -- your ancestors didn't get any of them.

10. People worry that the U.S. economy will end up stagnant like Japan's. Next time you hear that, remember that unemployment in Japan hasn't been above 5.6% in the past 25 years, its government corruption ranking has consistently improved, incomes per capita adjusted for purchasing power have grown at a decent rate, and life expectancy has risen by nearly five years. I can think of worse scenarios.

11. Two percent of American homes had electricity in 1900. J.P Morgan (the man) was one of the first to install electricity in his home, and it required a private power plant on his property. Even by 1950, close to 30% of American homes didn't have electricity. It wasn't until the 1970s that virtually all homes were powered. Adjusted for wage growth, electricity cost more than 10 times as much in 1900 as it does today, according to professor Julian Simon.

14. In 1952, 38,000 people contracted polio in America alone, according to the Centers for Disease Control. In 2012, there were fewer than 300 reported cases of polio in the entire world.

15. From 1920 to 1949, an average of 433,000 people died each year globally from "extreme weather events." That figure has plunged to 27,500 per year, according to Indur Goklany of the International Policy Network, largely thanks to "increases in societies' collective adaptive capacities."

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.

20. Almost no homes had a refrigerator in 1900, according to Frederick Lewis Allan's The Big Change, let alone a car. Today they sell cars with refrigerators in them.

29. In 1900, African Americans had an illiteracy rate of nearly 45%, according to the Census Bureau. Today, it's statistically close to zero.

30. People talk about how expensive college is today, but a century ago fewer than one in 20 Americans ever stepped foot in a university. College wasn't an option at any price for some minorities because of segregation just six decades ago.

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.

39. The average American car got 13 miles per gallon in 1975, and more than 26 miles per gallon in 2013, according to the Energy Protection Agency. This has an effect identical to cutting the cost of gasoline in half.

41. The percentage of Americans age 65 and older who live in poverty has dropped from nearly 30% in 1966 to less than 10% by 2010.

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.

44. From 1920 to 1980, an average of 395 people per 100,000 died from famine worldwide each decade. During the 2000s, that fell to three per 100,000, according to The Economist.

46. As recently as 1950, nearly 40% of American homes didn't have a telephone. Today, there are 500 million Internet-connected devices in America, or enough for 5.7 per household.

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.

49. You need an annual income of $34,000 a year to be in the richest 1% of the world, according to World Bank economist Branko Milanovic's 2010 book The Haves and the Have-Nots. To be in the top half of the globe you need to earn just $1,225 a year. For the top 20%, it's $5,000 per year. Enter the top 10% with $12,000 a year. To be included in the top 0.1% requires an annual income of $70,000. America's poorest are some of the world's richest.

50. Only 4% of humans get to live in America. Odds are you're one of them. We've got it made. Be thankful.