I'd say that I'd have everyone become more scrutinizing, while accepting that they may not find the answers they are looking for in their lifetime, and to be accepting of people who base their way of living around an incomplete rationale different from your incomplete rationale. And if their life-style begins to impede upon yours, don't just burn bridges with them, but actually work to figure out a solution.
If not that, then I would have leadership abilities go through the roof, then, monarchies for everyone, a single person rules, they make the best possible decisions rather than be pushed around by the people's stupid whims. People at large can't be trusted to make smart/good decisions.