In stark contrast to every other developed country, America has built into a very individualist society. In so many aspects of life it comes down to "me before us". Healthcare, education, work, welfare and so much more. With everyone scrambling hard to make ends meet, violence and anger are always just under the surface.
Either you get in and take yours for you, or you get left horribly behind.
Ben Harper said it best - "Everyone I know is in the fight of their lives."