There’s actually research on this. There are groups of people that donate more than others. There are two groups of people that really matter for this: people who have protection values and people who have democratic values.

People with protection values care about themselves and their people (their family, their clan, their tribe, their religion, their nation). People with democratic values care about humans in general, regardless of their religion, nationality, what family they come from, etc.

So, who donates more money? People with democratic values.

You can check out Christian Welzel’s Freedom Rising for more on this :)