You should definitely read the article, it's pretty good. That said, I'd say it's not the stupid that make life miserable for everyone else, it's the smart people that were born earlier. A smart person with power sets rules to benefit themselves. They may or may not care about what happens after they die. Those that care will almost certainly want to advantage their descendants and friends. Enough iterations on this same pattern and you get the kafkaesque and at times idiotic modern society.