I'm not a mod or historian, but your question has been asked before.

some FAQ links here: What is the truth between the rivalry between Nikola Tesla and Thomas Edison

Also a bonus [badhistory] (http://www.reddit.com/r/badhistory/comments/1rdmfe/is_the_whole_reddit_circlejerk_on_tesla_good_and/) thread.

If you have a more specific question that's not addressed above, I recommend you rephrase your question and resubmit.