2016 was the year of walls. Hard to miss the external ones, often newly constructed or noisily resurrected. But invisible barriers, the taller, more insidious kind, have also gone back up – or they’ve been there all along. Except now those walls are being rendered visible by groups traditionally kept marginal by them. Forces of disruption and social change speak truth to the power of barriers in our time. But can they actually bring any down? For photo gallery and recap of Walls, read here.