If the law forbids the sale of something above a certain price that price is called Price Ceiling. It is a government-imposed price control or limit on how a high a price is charged for a specific product. This will protect consumers from unattainable necessary commodities.
The first one that comes to mind is the Woolworth's Lunch Counter sit in in Greensboro, North Carolina, in 1960. 4 African American gentlemen walked in and sat down and politely asked for service. They were rudely refused and told to leave. At that point they chose to remain seated. Despite having numerous insults hurled at them, they never fought back nor did they return the hate-filled speech. There are numerous other attempts during the 1950s, where African American men and women attempted to start a change at Soda Fountains around the country.
Jackie Robinson's career is another example of nonviolent protest. He was extremely talented, but one of the main reasons that was cited, as to why he was chosen, was for his ability to control himself. Despite the death threats off the field and the dirty tricks and plays on the field, Robinson never "lost his cool." He gained fans as they watched what he endured on the field.
When the constitution was written, the signers compromised and decided that at a date 20 years from then, the slave trade would end. this would mean that no more slaves would be imported, however, all slaves already in the states would remain slaves. it would have at least been a step in the right direction. the date was not met, and was merely ignored until the civil war broke out.
The one the only, the ever so infamous, Joseph Stalin.