If you’re depressed by the state of the world, let me toss out an idea: In the long arc of human history, 2019 has been the best year ever.

The bad things that you fret about are true. But it’s also true that since modern humans emerged about 200,000 years ago, 2019 was probably the year in which children were least likely to die, adults were least likely to be illiterate and people were least likely to suffer excruciating and disfiguring diseases.

Every single day in recent years, another 325,000 people got their first access to electricity. Each day, more than 200,000 got piped water for the first time. And some 650,000 went online for the first time, every single day.

Perhaps the greatest calamity for anyone is to lose a child. That used to be common: Historically, almost half of all humans died in childhood. As recently as 1950, 27 percent of all children still died by age 15. Now that figure has dropped to about 4 percent.