What, to you, were the most important breakthroughs of the 20th century?

So, Lunt, you want reasonable answers to your questions. Right?

Well then, I advise you to give reasonable answers to other people's questions. Like here:

http://answers.yahoo.com/question/index?qid=201308...

where the sum total of your answer is this:

Change the 'l' to a 'r'.

Boy, that was funny. Hur dur.

The person wanted to know how to change molality to molarity and you gave the answer above. Do you feel proud of yourself for such a useless answer?

Here's an experiment: show your answer (and my answer) to the question I linked to. Ask them which is the better answer and which answer deliberately misses the point of the question.

Does your simple brain wrap around that? Your answer deliberately missed the point and, yet, here you are asking a serious question and expecting serious answers.

My request to you: stay out of the chemistry section. You're not helping.

Most important breakthrough of the 20th century: Alan Turing writing "On Computable Numbers" in 1938. Don't believe me? That shows that you don't really know as much as you think you do.

The most important breakthroughs were the most fundamental, and for the most fundamental you have to talk about physics. For example, the electron was only discovered in 1897. Think of what the world was by 1997, and how much of our advances depend on the understanding and manipulation of electrons.

There were SO many! A lot of medical breakthroughs happened, and all our wars brought new inventions. The stock market crash taught us lessons about handling money. There was at LEAST one event of every decade that was important.

What type of breakthrough? Scientific? Social? My personal life?