For those who don't know, "Modern History" is the historiographical approach to the timeframe after the post-classical era (AKA the Middle Ages). There are different segments of "Modern history": Early modern history (16th to 18th century), late modern history (19th to 20th century), and contemporary history (everything relevant to present time, which is currently the 21st century).
The only rule: You can't name someone who's killed a bunch of people, like Hitler or Stalin, because those are too easy of answers.
For me, I think Edison was one of the biggest shitheads in modern history.
This video barely scratched the surface. The video stated that he had almost no original ideas whatsoever, and he STOLE everything that he's currently famous for from the real geniuses. That is definitely not true. But it did not explain the worst douchery that he had done. Two words: Nikola Tesla.
He offered Tesla about $10,000 to fix and improve one of his many "legal" patents. Tesla did just that, in record time. When he went to Tesla to claim the money that he was promised, that shithead retorted with "Oh Tesla, you don't understand our American humor!".
That incident where Edison forced his assistant to be a lab rat for experimental x-ray technology and the assistant ended up being horribly disfigured and later on died of cancer? Tesla warned him not to do it, but Edison pretty much told Tesla to go fuck himself and he went on with his little experiments anyway.
Tesla wanted to supply the entire world with energy made from his superior AC model generator, for free. Edison didn't want that, Edison wanted to make profits with his DC model. So in true Edison fashion, he electrocuted elephants as well as cats and dogs that he hired a bunch of kids to steal from neighborhoods, with Tesla's AC method in order to
Proof that Tesla was superior to Edison in every single way imaginable.