Your unique personality isn't a glitch—it's a feature. A diverse population is more resilient because it has a "tool" for every possible environmental challenge. The Evolution of Personality and Individual Differences

: Great for finding mates and building social networks, but it increases the risk of physical injury or exposure to disease.

If the environment stayed the same forever, we might all become one "type." But the world is constantly shifting. ensures that different traits are favored at different times: