Yes I am young, well, hanging on to youth anyway.
But I don't see why age and experience changes our thinking too much on this, and I fail to see why a look at out past history has any relevance. The reason being we have never had our population culled by a major disaster yet, and I'm talking a pretty much full wipe out of population here, a good 80% reduction due to some series of events.
At a point like this, I have hope (yes it is mainly hope I base my theory on) that a revolution in the way humanity conducts itself will take place.
We're are actually a very young species, that is evolving (in our thinking/society etc.) at a very, very fast rate, a rate so fast that our future actions are to a degree quite unpredictable. I'd go so far to say it's naive to consider a species as intelligent as humans will never learn from it's past mistakes and not have the capability to plan their future.
Whether that plan works or not is a different matter. I hope for utopia, but expect chaos.