- Mar 2017
I think our intelligence has, so far, worked against our physical limitations. By that I mean that we are built for walking long distances, not building Great Pyramids, Great Walls or anything else that requires heavy lifting and the strain it puts on the vertebrae and the lumbar muscles and knee and other joints. We have crippled ourselves, and not just by heavy labor, but in other ways, like sitting on a chair, risking DVT, peering at a monitor, which is not good for our eyes, and risking repetitive strain injury or even carpal tunnel syndrome as our fingers tap away.
One of my children has severe disabilities. He would have died at 15 without radical surgery. He'll never be cured and would likely pass on at least a predisposition to his diseases. In the past, he would not have survived to have children. I'm glad he's alive.