Invents A/C Electricity
Tries to give it to the world for free
Finds out someone is using one of his patents
"Let him use them, he is doing good work."
Finds out a contract he has with someone will cause that person to lose their business, and all his employees, their jobs.
Rips up contract
Invents a Death Ray that could have handed world domination to whoever held it.
Destroys it
Invents everything from X-rays, to Radar to wireless transmissions and A/C electricity.
Doesn't care that he gets no credit for it.
Dies poor and alone, except for the pigeons which he loved (true)...
Forgives everyones ignorance.
This guy literally invented the mordern world, and over 50 years before we could even figure out how to understand his inventions, let alone use them. This guy deserves all the credit he can get. All he wanted was to make the world better.