A man dressed as the Joker and holding a Mapuche flag cheers with others dressed in costumes during an anti-government protest in Santiago, Chile, Friday, Nov. 1, 2019. Chile has been facing days of unrest, triggered by a relatively minor increase in subway fares. The protests have shaken a nation noted for economic stability over the past decades, which has seen steadily declining poverty despite persistent high rates of inequality. (AP Photo/Rodrigo Abd)
In protests around the world, one image stands out: The Joker