Society is visibly decomposing before our eyes. You can tell because trust no longer exists. And those who trust, get burned, because they're taken advantage of. The issue is without trust, society does not exist. What's coming is frankly scary to me.
Trust has always been an issue too. I don't think you could ever blindly trust everyone. I generally trust a random person I meet will be telling truths as they understand the world, but I wouldn't rely on them. However, crime is historically low, the chance of being assaulted, mugged etc is lower than it has been, so it seems you can trust your fellow person more now.
There are community and social issues. But I know my neighbours pretty well, if they needed help I'd be there, they would be there for us and have been.
edit: I don't live in the US but I have done in the past and I generally found Americans as or more helpful and friendly neighbours, friends and colleagues.