This question is aimed at identifying which individual (acting as an activist trying to warn the public about a given issue) had the most critical insight that would have been valuable for the public to listen to charitably?

It's a paraphrase of "Which individual is the most important whistleblower of the 20s?".

Feel free to add individuals that you think have an important message that is being ignored by the general public.

Will resolve according to a poll on Manifold in 2030 that asks:

Which individual had the most important message to give to society in the 2020s?