A scientific approach to spreading rational thinking could be world-changing.
If rational thinking became more prevalent, you'd have more allies--more people asking questions like this about how to best direct their efforts toward the right problems. Rational thinking is a force-multiplier. At the same time, problems resulting from irrational thinking would be reduced.
In the early stages, the research could focus on how to teach rational thinking. From there, research could focus on how to pitch a rationality curriculum to school boards, or how to effectively convert adults to more rational ways of thinking.