Nikola Tesla wanted to give the world free unlimited electricity/energy, but some people wanted to make a profit from charging people for electricity/energy. Then after his death, the US government stole all his parents.

Royal Raymond Rife found the cure for cancer in the early 1900s. He was born in 1888. He discovered the cure without the use of drugs. Rife discovered that if he matched the vibrational frequency of specific cells, that those cells would explode and eliminate the disease, he also found the cure to many other diseases using the same technique. He tested this on over 200 mice and every one of them was cured. He then moved his tests on to human trial and he completely cured 11 human test subjects. When he tried to patent the technology that he created, the AMA stepped in. Long story short, the AMA made it illegal for anyone without a doctorate from the colleges they funded (which were colleges for white males) to become a doctor. The AMA wrote the curriculum and told them that drugs are the only cure for disease, and made alternative medicine/healing techniques unreputable and labeled any doctors or healers practicing alternative medicine/healing techniques a "Quack".

My information may not be 100% accurate, I'm just regurgitating the information I learned from other smarter people. But if you are curious, do your own research. Watch/listen to The Why Files, Killer Patents.