Musk to employee: "I am extremely disappointed" you chose to attend your child's birth instead of attending a boring-ass work event.

Elon Musk isn't going to change the world if you have to miss Pizza Fridays to take care of your dumb kid. (via Getty Images)

Elon Musk is a visionary. Just ask him. Like all true visionaries, Musk is also a maniac who has no idea that other people have priorities in life besides Elon Musk.

Author Ashlee Vance's new book Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future details Musk's life from South African squalor to Silicon Valley splendor. How does someone become one of the world's foremost tech thinkers? Like many of the greats before him, Musk scolds regular human beings for having regular human lives.

Sources: Business Insider