Furthermore, in the soft sciences (including politics and economics), much of the status quo is built on assumptions that, while they have a basis in historically observed human behavior, are still not "true" in the hard-science sense, and might become false if aggregate human behavior changes even a little.
Almost all of the empirical work done by political scientists and economists is on aggregate human behavior. Yes, the predictive power of the social sciences is often very weak, but social systems are incredibly complex, and in many ways vastly more difficult to understand than physical systems.
