>>11175306Depends on the context. Between middle class families in the same country? Between the elite of one nation versus the destitute of another culture?
In the context that this debate is generally held, nature is far more important. Parenting style, school quality, family wealth have minor influence on adult social status in developed countries.
Gregory Clark has great economic history data demonstrating social mobility based on some genetic quality:
https://www.youtube.com/watch?v=4m8ChR84I60