In the financial markets, special mention
Leo Melamed
There are many great men in the arena of financial speculation.
Leo stands apart.
He is credited for having invented in the 1970's what we call options' today.
In a nutshell, using options can protect your large investment in securities, provided that (I hurry to add) one is not as foolish as to invest all his money leaving him with nothing with which to hedge.
I know private options traders who make a fulltime living out of trading options outright, not for hedging.
Leo had no financial training, yet Destiny chose him to the inventor of something so great that it moves the markets.
He is not mega-wealthy, but country presidents consult him and he has a good life at which most people cannot even dream.
My hat off to you Leo!
Read the short article http://en.wikipedia.org/wiki/Leo_Melamed and perhaps you will understand one great thing.