Graffiti began in the 1920s-1930s as gang markings but became more popular in New York in the 1960s-1970s as people tagged their names. Authorities tried to stop subway tagging, so artists began tagging walls and adding more color and design. Taki 183 and Tracy 168 gained fame for their tagging styles. Graffiti can positively impact run-down areas by making them more vibrant, and it allows political expression, but it is also seen as vandalism and illegal. Pop art inspired graffiti with its use of commercial imagery and styles. Graffiti focuses on tagging to gain fame while street art makes statements, though both comment on society and politics. Famous graffiti artists include Egs, Os