What did the people of the 20th century learn?

Technology created world war I and world war II and the Korean War and the Viet Nam war and the Iraq and Syrian and Yemen and Saudi Arabian war on Yemen. That's what the 20th century taught us.

Trump obviously never learned that lesson sort of like Hitler in this with the same narcissistic personality disorder as Hitler by the way.

So, basically 20th century people (and since I was born 2 years before 1950 I have to consider myself to be one of these, that we learned that technology brings horrific wars of one kind or another which is why we are now having trade wars and secret KGB type wars like Putin is waging against all democracies and Saudi Arabia in specific (even though Saudi Arabia is not a democracy).

So, the lessons we learned in the 20th century create overpopulation in this century and the ONLY weapon against overpopulation that appears to be working to prevent another world war is abortion and birth control. Otherwise, the human race would already be extinct either during the 1970s with a nuclear war with China, (if Nixon and Kissenger hadn't stepped in and created an economic partner out of China). But, what exactly does Trump think he is presently doing? Starting a nuclear war maybe. Because the last big trade war we had with Germany and Japan ended in 100 million people dying in World war II. Is that where we are presently headed once again?

The two eras where we might have gone extinct in the 20th century was the 1970s (if we were without Kissinger and Nixon) and the 1990s (if Bill Clinton were not president). And during the 9-11 5 billion people died on the first timeline until we redid time and created the 2nd timeline where Bush read "My Pet Goat" instead of getting really upset and triggering doomsday weapons worldwide which killed at least 5 billion people within a month and most of the other several billion died in the next year without any food or water that wasn't radiated.

So, Bush and "My Pet Goat" created the 2nd timeline we are presently on. And there is a third timeline with Hillary Clinton as president we created too so that we have more ways to survive the next few centuries. If the 2nd timeline with Trump fails we might still survive on the 3rd timeline. If the third timeline fails with Hillary as president this century then possibly we will have to start a 4th timeline to recreate something similar to the 2nd and 3rd timeline to correct whatever mistakes were made that caused human extinction.

What did the people of the 20th century learn?

They learned about the horrors and blessings of technology, especially about nuclear weapons and time travel. But, time travel being the single most dangerous thing of all is kept secret on pain of death from the common people of the world.

Why is Time Travel so dangerous?

Because what if one time terrorist went back and prevented human life from being born on earth?