This article was originally published in the Huffington Post. But here you can read it without all the distracting ads.

1. Parks had been thrown off the bus a decade earlier by the same bus driver – for refusing to pay in the front and go around to the back to board. She had avoided that driver’s bus for twelve years because she knew well the risks of angering drivers, all of whom were white and carried guns. Her own mother had been threatened with physical violence by a bus driver, in front of Parks who was a child at the time. Parks’ neighbor had been killed for his bus stand, and teenage protester Claudette Colvin, among others, had recently been badly manhandled by the police.

2. Parks was a lifelong believer in self-defense. Malcolm X was her personal hero. Her family kept a gun in the house, including during the…