Me when my country still has lynchings of black and brown people, had horrific racial discrimination during the worst of the USSRs excesses, has the highest per capita incarceration rate of overwhelmingly black and indigenous people, is responsible in part for the deaths of over 1 million Iraqis, put Japanese Americans in concentration camps during WW2 just in case they were spies, genocided their native population and still effectively operates apartheid for the remaining natives, supports the ongoing genocide of Palestinians, locked up and tortured MENA people without trial post 9/11 in an offshore torture camp, ran black sites all across Iraq and Afghanistan doing more torture of brown people and on and on and on and on and on and on…
Equally important in dialectical materialism is that humans shape nature as we as are being shaped by it through sensuous activity - I.e. labour, transforming things with our hands, talking to and convincing others of viewpoints etc.