The Black Lives Matter movement formally began in 2013, in response to the murder of seventeen year old Trayvon Martin. Currently, the black lives matter movement has hit the global stage and now has 40 different chapters that practice the same mission.This movement was made for the advocation against police brutality and unjustified violence against african americans.Their mission is to eradicate systemic racism and white supremacy. Previous liberational movements have made it so cisgender, hetero, black males to have some sense of rights but have often forgotten about the other black lives affected by the white supremacy or systematic oppression. The Black LGBTQA+ communiy, the woman and others. Black lives matter does their best to focus on all lives. Here are a few links to sites that explain more in depth...
Here's an explanatory video as well...
If the video won't load here is the link so you can watch it as well. Link
Here's the video with the founders of the movement
If the video won't load here is the link so you can watch it as well. Link