power comes from the shadows and the margins

Ideas at first considered outrageous or ridiculous or extreme gradually become what people think they've always believed. How the transformation happened is rarely remembered, in part because it's compromising: it recalls the mainstream what the mainstream was, say pabidly homophobic or racist in a way it no longer is; and it recalls that power comes from the shadows and the margins, that our hope is in the dark around the edges, not the limelight of center stage. Our hope and often our power. 

- Hope in th Dark (Foreword to the 2015 edition), Rebecca Solnit