Not being concerned with the fall of humanity is the very thing that's causing America to be left behind. The world has shifted, the frontier mentality and the idea of American exceptionalism is becoming outdated, it's fallen victim to technology that links the globe and promotes collectivism over individualism.
America is still one of the leaders of technological development, especially when it comes to military technology, but it needs to let go of the idea of ruling the globe and invest more into domestic growth, and strengthening the North American continent as a whole so that the desperate poverty and drug crimes of Mexico are cured. You can't just build a fence to keep out cultural rot.
Technology tends to fall into broad categories, and everything is built on what came before it to make it more efficient. A car is the improvement of the horse carriage, the horse carriage was a combination of the litter and the chariot, trace it back to the invention of the wheel and it's the same idea, just modified and improved. Science isn't just thinking of random miracles, it's building on what is already known. I disagree that the efficiency of any design can't be improved, because I see the design in broad strokes where the engine isn't the specific design of that engine, but the concept of "convert fuel into power and apply to cause motion," and of course that can be improved. In broad strokes, a horse was fuel for a carriage, slaves were fuel for a litter, and the sun is fuel for solar power. It's always the basic concept, and it's always being improved.