In Jared Diamond's book "Collapse", he has a list of stages that all the societies that collapsed went through.
They go something like this
There's nothing going on that would negatively affect our society
There might be something going on that would negatively affect our society, but nobody knows for certain. So, we shouldn't do anything different.
There's probably something going on that would negatively affect our society, but it would cost too much to do anything about it.
Our society is definitely in trouble, but it's too late for us to do anything about it. Everybody pray..
Of course, there are also societies described that didn't collapse, but they had a different response at some stage before the last on.