Yes we landed on the moon

. But I think your analogy is asinine. Two completely different things. The United States and the worlds economy runs on oil. I dont know if that can be done away with in 50 years. Think about it. Gasoline, grease, plastic, cosmetics, cleaning products, synthetic rubber, lubricats, vaseline, synthetic fabrics, shampoo, conditioner, toothpaste, medicine, foods all of these things have major ties to oil.
I think if a world wide initive was launched, then I could see the world transitioning away from oil in 75-100 years. Anything quicker than that is just wishful thinking IMO.