Since the industrial revolution, we have depended entirely on fossil fuels.
That is not just for transportation, manufacturing, heating, and cooling, but also for the creation of fertilizers and almost all farm production.
If and when fossil fuels run out, humans will be starving until the population significantly decreases.
That is unless we somehow discover some miracle energy source like fusion.
But that is very unlikely, and things like wind, solar, and geothermal are way too tiny in comparison.
I don't believe it's unlikely that we'll develop fusion. Progress has been getting more rapid every year.
I am very, very skeptical.
They have been claiming big breakthroughs and right around the corner for over 50 years now with fusion.
I think the reason it will never happen is that if fusion ever because easy, like the "Mr. Fusion" added to the DeLorean on the one of the "Back to the Future" movies, then everyone would have a potential city destroying weapon.
Anyway, the point is we are relying totally on fossil fuels that concentrate millions of years of sunlight energy in very small space, and is rapidly running out.
Fusion cannot be made into a bomb. You obviously understand nothing about the process.
Fusion can ALWAYS be made into a bomb!
What you forget is that the size of current fusion reactors is so that they can withstand continual operation, and produce significant continual results. The reality is that once the process is ever perfected, micro miniaturization for a weapon, would be trivial.
Just because it is easy to shut down fusion experiments by cutting off the deuterium and tritium fuel, that does not mean it is not just as easy to let it race. Unlike fission, there no critical mass required. If it is self sustaining, all you need is the tiniest start and enough deuterium and tritium. Magnetic containment is just to allow it to continue while fuel starved. Without fuel starvation, you don't need magnetic containment. So much excess heat would be generated so quickly that it does not need to be or even could be contained.
For example, what if they discovered a way of initiating fusion with just a couple of lasers? The technology could be so cheap and easy, Uganda even could become a thermonuclear power over night. Not a good idea.