Street art has been around for decades now, and it's one of the most popular but also amorphous genres of art today. Generations of artists to have sprung up and then disappeared, and the art form has been around long enough for a set of artists to emerge who have come to influence the overall genre. For this list, we have tried to look at artists throughout street art's history to gauge their influence on street art and art in general. The end result is our best estimate of the The 50 Most Influential Street Artists of All Time, both influential globally and in specific locales or subgenres of street art as well as over the course of street art's history. We made this list to serve as a starting point for debate. Here's our take. What's yours?