I think the answer to that is being bias
Because, I don't think anybody wants to live in a community full of trash. (Littering) :)
A Social Category is simply a means of classifying people according to a shared trait or a common status
For example , let's take a look at teenage and elderly category. It would be very likely that the majority members of these two groups had a completely different value about social issues
This best illustrates the feel-good, do-good phenomenon. In addition, experts have discovered that the more people do acts of altruism, the higher they raise their self-worth and raise their gladness. As an outcome, this makes them want to endure to do a more optimistic loving habit which then makes them feel even better about themselves and makes them want to do even more acts of altruism and headlong the upward cycle goes.
