Solidarity is not a matter of altruism. Solidarity comes from the inability to tolerate the affront to our own integrity of passive or active collaboration in the oppression of others, and from the deep recognition of our most expansive self-interest. From the recognition that, like it or not, our liberation is bound up with that of every other being on the planet, and that politically, spiritually, in our heart of hearts we know anything else is unaffordable.