Acts of sacrifice and decency without regard to what's in it for you create ripple effects. Ones that lift up families and communities, that spread opportunity and boost our economy.
Individuals may form communities, but it is institutions alone that can create a nation.
Life isn't about having, it's about being. You could surround yourself with all that money can buy, and you'd still be as miserable as a human can be. I know people with perfect bodies who don't have half the happiness I've found. On my journeys I've seen more joy in the slums of Mumbai and the orphanages of Africa than in wealthy gated communities and on sprawling estates worth millions. Why is that? You'll find contentment when your talents and passion are completely engaged, in full force. Recognise instant self-gratification for what it is. Resist the temptation to grab for material objects like the perfect house, the coolest clothes or the hottest car. The if I just had X, I would be happy syndrome is a mass delusion. When you look for happiness in mere objects, they are never enough. Look around. Look within.
Wikipedia is a non-profit. It was either the dumbest thing I ever did or the smartest thing I ever did. Communities can build amazing things, but you have to be part of that community and you can't abuse them. You have to be very respectful of what their needs are.