The inventor of the snapshot camera committed suicide. His note said "my work is done, why wait."

His name was George Eastman. He was the inventor of the first Kodak snapshot camera. You might recognize the name he gave to it: the Kodak camera. In addition to being one of the first brand names invented from nonsense syllables, it also sparked a photographic revolution that is still strong today.

He was able to simplify the photography process and create a product that everyone was able to use. He also pioneered a system in which employees of the company got dividends, essentially making them part-owners of the company. Sadly, when he was 77, he had spinal stenosis, which is a narrowing of the spinal canal. The pain for him was pretty big.

He decided to commit suicide by shooting himself in the heart. He left a short and simple note: "To my friends: My work is done. Why wait?"

(Source)