The Slow Re-Education of a Society to Accept and Use New Technologies

There were only two new technologies introduced in the middle of the 20th century. Solar power didn't even come along until almost the 21st century. Wind power has no chance of becoming a dominant source of energy before 2100 if then. So, Marchetti's prediction and I think it will show itself to be true is that the major sources of energy by 2050 will be natural gas and nuclear power. They will represent a huge value of energy around the world.