When Time Magazine named "The Protester" the person of the year, it confirmed one the most critical lessons of 2011. When brave, impassioned voices come together to speak out against injustice, that's when sweeping, social change is made.
As we head into the new year, using social media or your local community meeting spot to engage world leaders will no longer be reserved for the seasoned activist. It will be the expectation for anyone who cares deeply about an issue to take advantage of those platforms to speak out.
But, how does an inspired citizen move from simply caring about an issue to becoming an effective activist?
Huffington Post Impact interviewed six change-makers who have devoted their livelihoods to just that to find out. Read through our slideshow to learn how you can commit 2012 to becoming a mover and shaker who can change the world.