Why was Rosa Parks brave for staying in her seat?

One December evening in 1955, in Montgomery, Alabama, a woman named Rosa Parks finished her workday and climbed onto a city bus. She paid her fare, found a seat, and sat down. That sounds like the most ordinary thing in the world. But that small, quiet act would help change a whole country — and to understand why, we have to understand the rule she was about to break.
Back then, the South had laws that separated people by the color of their skin. They were called segregation laws. On buses, Black riders were expected to sit in the back, and to give up their seats to white riders if the front filled up. It was unfair, it was humiliating, and — most importantly — it was the actual law. Breaking it could get you arrested.
