The importance of a good energy source

I’m convinced that the single best use of our resources at present would be energy research and infrastructure.  Imagine  how our world could be different right now if we had a plentiful, cheap, clean source of energy.  Oil rich countries would lose their sway over other nations. Energy can be used to obtain fresh water and make light. heat, and cold, thus making habitable and farmable nearly any place on the planet.  Those places currently struggling for survival would be able to live comfortably and focus on things like education  and society, rather than scrounging for food and making war. Educated people rend to have fewer children, further reducing the problems of overpopulaton and the problems that come with it.