The World of today still seems to be similar to the world of 1940. The world of 2019 and the world of 1940 are both mainly based on oil and steel. We can see in movies and documentary reels that we still have tanks and aircraft carriers that look similar. The planes changed from propeller to jets in the 1960s. The world has increased steel and oil production by about 15 times since 1940. We can get a sense of the pace of change by looking at production increases across the decades.
