I have divorced parents due to father's alcoholism, and grew up in poverty by American standards (lower middle class by Russian standards I guess - we always ha

I have divorced parents due to father's alcoholism, and grew up in poverty by American standards (lower middle class by Russian standards I guess - we always had food, a flat and basic clothing, but no car nor any fancy stuff like cellphones or >1 TV :)), bullying exists in schools in Russia but is mellow by American standards as depicted in media. Again by what I understand from American teachers on how schools are, teachers were constantly "crushing our spirit", although I don't think of it this way, I think discipline is good. Yet, I was pretty happy throughout my life so far. I think the main contributor to my unhappiness is constantly worrying about the future, including macro future (like political instability in America) but sometimes I just look at my present life and remember that I was happy as a student who had to choose between internet and beer every month, I often didn't have money to pay for both ;) I wonder how much of this is simply genetic...