During the time of Christ, the human population on Earth was at a steady 200 million. In the 1800s, at the height of the industrial revolution, the human population passed the 1 billion mark. But today, about 200 years later, the population boomed to be over 7 billion. And by 2050, it’s expected to rise to 9.7 billion.
Movement is in our DNA. Until about 10,000 years ago — or 99% of human history — there were few, if any homes or villages. People were nomadic, chasing food and gentler climates. While we couldn’t change the weather, we learned how to domesticate plants and animals in what is now called the Neolithic Revolution. And when the food stopped moving, so did we.