I'd crush that pathetic prokaryote squirming in that swollen primordial soup and end this all from the start.

Prevent Karl Marx and Friederich Engels, and all other potential communists from surviving past the age of 3.

I would meet with the founders of the United States and inform them of the way liberals would twist the constitution (though they saw most of it coming) and try to add more safe-guards against the taking of freedoms and liberty here in the USA.

Find Euler, tell him he's a jerk and that I'm tired of hearing about his stupid paths and circuits.

I would have gutted Abraham like a fish with the same dagger he tried to murder his son with. Then I would have jumped around saying "Now what bitch?" like I was on Springer.

I would manipulate events that would end in a world war between the United Combative States of Soviet Canada between New Amerika (the Russians won the cold war.)

i would go back to were Jesus was born and well...... i just one to touch a piece of his cloth.

To stop the transport of crimmals to the New World. England and other countries set their crimmals here rather than to send them to jail. The end result is present day citizen of the USA. A direct product of these actions.

People wonder why the USA is against the death penalty, punishing bystanders for not interveining, and such corption in the government; it is due to bad breeding. A product of crimmals having offspring. Morals and ethics cannot triumph when there is none.

I would intervene in history to prevent an event from taking place. However, I do not see the point because that event is bound to happen no matter what I do. I might have prevented it from happening at that specific date but I did not prevent it from taking place in the future… It probably will not be the exact same event but it will be very similar.

We learn and keep in mind our past mistakes in order to avoid repeating them. In general, if we did not make that mistake today chances are that we will make it tomorrow or after tomorrow.

Kill Charles Dickens before he manages to write A Tale of Two Cities.

the American rebellion failed, or at least Britain still has its empire.

i would take an automatic weapon and show the government of america back in the 1700's how to create the new weapon

I would not intervene in the least. There are too many variables that could make the world of today a far worse place than it is now, even if a horrendous incident in history (WWII, perhaps) had never occurred.

I'll stop Abraham Lincoln and many other people from being assassinated.

Go back and make sure that the bomb in the brief case actually went off and killed Hitler.

Not let Britain sneak into India and slither it's way to rule it.

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I would have prevented Patton's death and let him take care of the Russians.

I would have stopped 9/11.

I would bring better medical technology back to the Civil War.