In 1962, the Food and Drug Administration approved the birth con­trol pill. I would sub­mit that that’s one of the four or five most trans­for­ma­tive tech­no­log­i­cal changes of the last mil­len­ni­um. Not just the last cen­tu­ry. Because for the first time in the his­to­ry of the world, half the peo­ple on Earth no longer have to depend on the oth­er half for the arc of their lives.