Do some math. Take a city of 4 million people.
If everyone needs a pound of food per day, thats 2000 tons of food per day. Can’t move that with a horse and buggy.
Refrigerating that food. At 1 kilowatt per pound thats 4000 megawatts.
That’s just food. Then there’s power, transport, hospitals, sanitation. Wind and solar don’t have the energy densities of oil.
Desalination is a rising issue as the world looks to water. Its power-hungry but water is a necessity. Iran is smart, they’re looking to nuclear because they know the oil will run out. How about the rest of us?