I think particularly in the US, there is certainly a link between race rights and socio-economic class, but I think to that end ,improving access to education and helping lift those in the least-privileged socio-economic class out of poverty would do a lot more to combat racial imbalance than anything else. As far as female/LGBTQ rights, I'm not aware of them being statistically more likely to come from a lower socio-economic class, but I could well be wrong!