Stonewall has been compared to any number of acts of radical protest and defiance in American history from the Boston Tea Party on. But the best and certainly a more nearly contemporary analogy is with Rosa Parks' refusal to move to the back of the bus in Montgomery, Alabama, in December 1955, which sparked the modern civil rights movement. Within months after Stonewall radical gay liberation groups and newsletters sprang up in cities and on college campuses across America and then across all of northern Europe as well.