Humanity is doomed. We evolved the ability and the motivation to cooperate, but with only a very narrow scope of "our people". We found that the best way to succeed was to manipulate, abuse, and kill anyone or any creature or any landscape outside of "our people" when the situation calls for it. The social order has not changed since 100,000 years ago, we just give the classes and the tribes new names. People are not evolved to understand a worldwide scale of society. So of course the first and best option when things get tough is to gather the spears, or these days, gather the guns and the bombs. It's remarkable we still have a world now that nuclear arms are available to any nation with the capital for it. But on the astronomical time scale we are still in the first moments following their development. I don't see how humanity makes it to "3,000 years after Christ" unless there is a tremendous worldwide shift in thinking.

The world hasn’t been improving. It’s tradeoffs all the way down. Hunter-gatherers have continually refused to live in “civilization”, even today.