I heard from a source that there are more people alive today on Earth than dead people. Meaning there are more humans alive today (7.8 billion) than all of the former living humans in the past combined. I remember when I was a young juvenil when the world population was 2.5 billion and McDonalds was celebrating that they have sold 500,000 hamburgers. Holy crap !!! There were only 1 billion people living back in 1800.