Nikola Tesla is in my opinion the greatest man ever lived. He had thoughts on how to capture free energy and not only that but also how to tranfer it around the world without the use of wires. His only mistake is that he shared his thoughts with the greedy capitalists and they stoped him. It was not really a mistake, it was the only way to realize his visions. He was a pioneer in modern electrical engineering. After watching the documentary look around and see in how many ways Tesla impacts our lives, how many devices are based on his inventions. Other made millions by using his inventions while he died penniless. Free energy was not the only vision he had, he designed a shield that can protect cities from attacks and many more. If we had more men like Nikola Tesla the world would be a better place.