That was one of my "bonus" questions back in the day for plane physics class. The internet was a twinkle in everyone's eye at the time so you had to actually look it up book by book in the library. Only two of us got it right. Tesla was also depressive and possibly autistic, but undoubtedly had talent that should have been shared way more than it was. An untapped reserve of invention.Actually a great point, Nichola Tesla pioneered wireless electricity! Electric trains, planes and automobiles would have been all possible. However would it have been able to provide all the electricity all would require? Wardenclyffe Tower - Wikipedia