The movement was born in 2013, after the man who shot and killed an unarmed black teenager, Trayvon Martin, was cleared of his murder. Black Lives Matter now describes itself as a “chapter-based national organization working for the validity of black life”. It has developed to include the issues of black women and LGBT communities, undocumented black people and black people with disabilities.

As the largest national lesbian, gay, bisexual, transgender and queer civil rights organization, HRC envisions a world where LGBTQ people are ensured of their basic equal rights, and can be open, honest and safe at home, at work and in the community.

The ‘me too’ movement supports survivors of sexual violence and their allies by connecting survivors to resources, offering community organizing resources, pursuing a ‘me too’ policy platform, and gathering sexual violence researchers and research.

#FridaysForFuture is a movement that began in August 2018, after 15 years old Greta Thunberg sat in front of the Swedish parliament every schoolday for three weeks, to protest against the lack of action on the climate crisis. She posted what she was doing on Instagram and Twitter and it soon went viral.

When you’re undocumented, you face a lot of discrimination, and that creates a lot of fear. At United We Dream, we transform that fear into finding your voice. We empower people to develop their leadership, their organizing skills, and to develop our own campaigns to fight for justice and dignity for immigrants and all people. This is achieved through immigrant youth-led campaigns at the local, state, and federal level.

Wikipedia's list of 21st century protests