Did Climate Swings Shape Ancient Personality Scores?

After looking at how ancient height polygenic scores track local climate shifts, the obvious next question for me was whether the same model would “light up” for psychological traits.

To be absolutely clear: I do not mean personality in the loose, everyday sense. I mean modern Genome-Wide Association Study (GWAS) weighted scores projected into ancient genomes. I am looking at Polygenic Scores (PGS) for the Big Five personality traits, plus two sparse psychiatric comparison scores for autism and schizophrenia as a social-behavioral sanity check.

The question I am asking is simple: When a specific geography became warmer or colder than it had been 1,000 years earlier, did later ancient samples from that exact place carry different psychological PGS?

To find out, I pushed the data through the exact same rigorous controls I used for the height analysis. Here is how the experiment was structured, where the signals emerged, and what happened when I forced the model to look closer.