A low social status can be bad for you. Researchers looked at the health of 45 female monkeys. The monkeys with a lower social status were unhealthier. The monkeys were put into groups. A new monkey was then added to each group. Researchers said the "new girl" was unhealthier because she was at the bottom of the group.
The study was on monkeys, but it could also be true for humans. A professor said governments should understand that people with a lower social status have more health problems. Poorer people have cars and TVs, but that does not mean they are happy. Richer people can live up to 20 years longer than poorer people.