Incidentally, I was browsing his sitemap and, learned that three years ago he wrote an article that answered a question I’ve been wondering about for a while. I heard a while back that there are more people alive today than dead. This didn’t really make sense, but I wasn’t certain what the numbers would even be. It turns out to be false, and in reality about 5 to 6% of the people who have ever lived are alive today. There’s more information here.