I think a large number of people grow up to be inconsiderate and just aren't educated with basic manners. I see people littering the street, playing loud music at night which may disturb others etc.

But if you speak of a "greater good" then the problem is a lot of people don't understand or just fail to agree upon what that means. I spoke to someone about my work with open source and free software and the person just said "oh, but that's just to make yourself look good", as if its some sort of check list that "look I'm charitable" and not an objectively better choice in most situations.

At that point I'd be like why the fuck would I want this selfish thick skulled ass to have anything good? And ironically become selfish.