@The_Observer - I wholeheartedly agree with what you've said here in many ways. The two main points of which I agree with you are:

- You shouldn't change every mistake you made in your past; in fact, you learn from most mistakes.
- Major catastrophic events such as the Holocaust, 9/11, and various natural disasters such as hurricanes and earthquakes need not be changed, as they were likely meant to serve a purpose.
- Elvis Presley and John Lennon: Still Alive - An account of what things could look like with Elvis and John Lennon being alive and well, going well into the 21st century, as well as how their premature deaths can be prevented.
- Pioneer Renaissance Figures - An expansion of the artistic, literary, musical, etc. power of the Renaissance, through the invention of geniuses who can make the Renaissance an even more powerful force throughout Europe, as well as, in the long run, give various countries in Europe a greater artistic, literary, musical, etc. tradition.
