Financial inequality has been in the news a lot recently. It was the rallying cry for the Occupy Wall Street movement that began back in 2011, and it was at the center of Bernie Sanders’ campaign when he ran for president. This inequality creates what is typically called a social status ladder, with rich people at the top and poorer people toward the bottom. Research shows that your position on the ladder is actually one of the most powerful predictors of health. But it’s so much more than just how much money you have or how fancy your education is. It’s how you feel you compare to other people -- your subjective social status. We’ve scoured the research, looking at human and animal studies, to find out how your subjective social status actually affects your health.