The doubling of humankind

When my great-great-great grand­fa­ther William Can­dlish was born in Vir­ginia in 1804, there were 1 bil­lion peo­ple in the world. It had taken thou­sands of years for the world to reach that mile­stone of human sat­u­ra­tion. When my father was born in the 1930’s, the num­ber of peo­ple in the world had just passed the 2 […]