[3] Foster is a leading voice for marginalized and working class communities in spaces pushing for social, economic and environmental justice.

In September 2017, TAU VR was featured on XQ Super School Live,[16] which was aired on ABC, CBS, NBC, and FOX which depicted his story of placing 3rd at the World Series of Entrepreneurship.

[19][20] On September 13, 2019, Thunberg as a part of her trans-American voyage to COP 25 in Santiago, Chile joined Foster's White House climate strikes which drew thousands to the site.

It aims to "educate, empower and mobilise a movement of young people to be civically active and engage on the local and global stage through their intersectional youth-focused civic partnerships",[28] OneMillionOfUs has built a large coalition that will provide young people with the tools they need to spur systemic change in their communities, school buildings and political offices.

[31] In July 2022, Foster and his partner, Elijah McKenzie-Jackson, co-authored a letter to the UNFCCC[32] to call on the United Nations to move COP27 climate summit[33] due to Egypt's "LGBTQ+ torture, woman slaughter, and civil rights suppression" he says[34] after they started looking into logistics of traveling to Sharm El-Sheikh.

The letter, which was directed towards UNFCCC Executive-Secretary, Patricia Espinosa,[37] was signed by prominent activists such as Nadya Tolokonnikova, Ahmed Alaa, and Eric Njuguna.