http://en.wikipedia.org/wiki/Nikola_Tesla
However, Tesla's research was financed by Rockefeller (duh). When Mr. R. found out that Tesla created a "free" energy that could be freely transmitted, he took away all (or most) of the funding and made Tesla shut down the research.
Nearing his death, Tesla was working on government research of some mind controlling weapon, he was also slowly losing his mind due to being old and sick. Right after he died in his hotel room, FBI had confiscated all of his documents that were locked in his private safe in his hotel room. So guess what? In those Top Secret papers there could be answers to all kinds of energy solutions and maybe weapons.
So why is it locked away? Yes, Lj1221 is right that oil companies are making huge profits and don't want to lose them. That's one of the main reason why Rockefeller took away funding from Tesla and put a stop on his research. BUT the picture is MUCH MUCH bigger!After the FBI was contacted by the War Department, his papers were declared to be top secret. The personal effects were sequestered on the advice of presidential advisers; J. Edgar Hoover declared the case most secret, because of the nature of Tesla's inventions and patents.
Just imagine - in one beautiful day on TV the tell you how to convert your engine into electric motor that never needs refueling (or buy electric motor for cheap, whatever). What is going to happen? No one is going to buy oil, stock market is going to crash, oil companies will fire thousands of people - also mass layoffs of car producing plants, car repair shops, gas stations, parts producing plants, service and maintenance etc.
In addition, there will be no need to coal, nuclear, water-based electric power plants. All those companies will go bankrupt too! What happens next? Dollar crashes, Euro crashes, Russia, Saudi Arabia, United Arab Emirates, Iran, Iraq, Kuwait - ALL of those countries GO BANKRUPT because no one is buying oil any more.
This is a way to the anarchy or a new world order! New history, new powers, new wars, new ideals, new economies, new goals and needs in life... God only knows what would happen!
So just think for a moment? How much research out there in the world exist that we don't know about? I saw a sci-fi movie on Russian TV that talked about a cure for diabetes and that there is a drug that is sold on the black market for $20 000 or $50 000 bucks that takes away need for insulin shots!
The world we live in is engineered and geared towards concentration of power in the hands of the rich, in the hands of the few. We depend on oil as much as we depend on hospitals, banks and currency (unfortunately). Whole world runs on oil, oil is power, oil is money, oil is economy of the world. You take away oil - you take away world economy. Of course IT WILL NOT happen! Yes, there is a way to slowly decrease consumption and introduce "green" energy and hybrid cars, but everyone knows that taking away oil will crash the world we live in today.
P.S. I saw another movie about GM killing USA trams and trolley's in 1950's and 1960's. SO SAD! Hands up to Europeans for saving and enlarging their tram and train network. I had a ride on high-speed French TGV train - it is flawless, comfortable, quiet, fast... loved it. All of the Europe is actually using trains very extensively, but USA always lagged behind through the history and built cheap rail network to cut costs, but sacrificed speed and quality.
P.P.S. A few days ago I test drove a brand new Honda CR-Z sport 2-door hybrid coupe. Stick option is really fun to drive, interior is really cool and futuristic. Much better than bland boring and ugly Prius. However, Lexus 400 hybrid is a pretty good vehicle, as well as his cousin Toyota Highlander Hybrid.