I'd just note here that 'truth through debate' is an ancient concept (Socrates - Aristotle - Plato etc.) that has been replaced with 'truth through experiment and observation' (Galileo - Newton - Maxwell - Einstein etc.). Of course many have attempted to use science to justify their behavior or to justify some arbitray human social organizations (i.e. Francis Galton and Social Darwinism, or Lysenko in the USSR and Phenotypic Modification, or more simply, nature vs. nurture).

However, science isn't the final arbiter for marking out the optimal societal norms, whatever those may be, although this seems to be the meaning of 'truth' as you use it in this context. An authoriarian state with zero personal freedom might be just as capable of feeding its human population as a libertarian state with a minimal set of legal restrictions, for example.