Rewilding the Urban Frontier: River Conservation in the Anthropocene - Hardcoverby Greg Gordon (Editor) More so than other ecosystems, urban rivers typify our evolving relationship with nature. Once a necessity for the development of civilization, by the twentieth century America's rivers became neglected and abused, channelized, dammed, and filled with sewage and toxic waste. While acknowledging the profound impact our species has had on the natural world, and on rivers in particular, Rewilding the Urban Frontier argues that the