[georgeglue1]

Human migration (under various situations / stresses like famines) has been studied in economics, sociology, etc..

There are also studies about generational poverty, medical literature on helping people recover from traumatic conditions, etc..

Not to read any bad intent in your comment, but there also have been studies about social darwinism that have a long track record of problems. I think people do still do studies about genetic inheritance etc., but it's probably impossible to draw society-level conclusions without data.