Resources are depleting to the stage where it will soon become cost ineffective to extract them. Although there may be plenty of resources deep within the Earth, the cost of extraction is rapidly increasing, having in some cases already reached the point where they have become a destroyer of wealth rather than a builder of wealth due to the cost (including publicly funded subsidy) of their extraction. This is what is really behind the huge global debt. We are trying to support a lifestyle based on cheap and plentiful resources, when they are no longer cheap or plentiful and are doing it on credit.
What we are in for is a descent from our accustomed lifestyle. This is now inevitable. How it unfolds and whether it is rapid and deep, resulting in almost total depopulation, or whether it is gradual and rational is the only question remaining.
But considering that it is an axiom that people will not lower their reproduction, and will not under any circumstances surrender any part of their energy and resource hungry lifestyle, all that can be done is to prop up the system and delay the inevitable. And the longer it is delayed the more the descent becomes a collapse.
When human populations drop low enough, it no longer becomes possible to mine any resources, because we are already using every technology available to mine whatever resources are within reach. Without resources, the surviving humans are left in a stone age existence they cannot escape. This leaves them vulnerable to the inevitable natural disasters.
Interestingly, decades ago it was governments that were building lavish bunkers to survive global disaster. Now it is the private sector who are doing so. That really is a sign of the times. The capitalists are building bunkers to escape the disaster that they themselves are creating.
Look around you. It is highly probable that everything you see, and everything you take for granted will soon be taken from you in the last mad scramble to cling to the tattered remains of last century's lifestyle. After that the stone age awaits you. I suggest that a century for humanity is very optimistic indeed.