Your's sound like reasoned comments - but why are you afraid of meeting different cultures? Most people get messed up when they encounter so much unfairness and inequity that they suffer from some degree of PTSD. Yes- some are natural bullies, others true psychopaths, and some are trained to become such, but the fact is that probably 95% of people want to be friendly, want to help and just want to get along with whatever they have and follow the route of least resistance. Why can't we make that route more amenable to sharing simple satisfactions instead of always pressing for zero-sum advantage? We have so much and yet so many of us seek only more despite knowing that in most cases  it brings us nothing of real import but isolation, loneliness and suffering. There is a lot of truth in that saying "what goes around comes around" - give a more generous version of that a shot- you won't regret it.