We should kill the dictators deliberately, improve our biology deliberately, and get stuffy old people like me to change their minds deliberately. No stupid use of death as a proxy, it's a horribly blunt instrument. "Let your ideas die in your place".

Besides, maybe it's the young people who are the most dogmatic. Studies are inconclusive: https://en.wikipedia.org/wiki/Planck%27s_principle#Rebuttal If we're going to go around killing people for having rigid ideas, perhaps concentrate on the young ones, for statistical reasons.