This may not come as relief to those who suffer from chronic back pain, slip disc, herniated disc, etc., but at least you know who to blame. (When you are in pain, it is good to curse someone).
So here goes ... The human spine, for example, is a lousy solution to the problem of supporting the load in an upright, two-legged creature. It would have made a lot more sense to distribute our weight across four equal cross-braced columns. Instead, all our weight is borne by a single column, putting enormous stress on the spine. We managed to survive upright (freeing out hands), but the cost for many people is agonizing back pain. We are struck with this barely adequate solution not because it is the best possible way to support the weight of a biped, but because the spine's structure evolved from that of four-legged creatures, and standing up poorly is (for creatures like us, who use tools) better than not standing up at all.
So you know who to blame.
And no. I have no idea if Gary Marcus, the author of this delightful little book called Kluge, suffers from back pain.