Why Negative Emotions Aren't All Bad

"Let’s start by questioning our assumptions for a moment. Are negative emotions all bad? Should we really try to get rid of them? After all, we figure that thumbs are useful because we evolved to have them over millions of years, and that tails are not because we evolved to lose them over time. So, if negative emotions have stuck around this long, shouldn’t there be some good reason to have them? (read more)