In Utopia

In 2005, J.C. Hallman came across a scientific paper about "Pleistocene Rewilding," a peculiar idea from conservation biology that suggested repopulating bereft ecosystems with endangered "megafauna." The plan sounded utterly utopian, but Hallman liked the idea as much as the scientists did—perhaps because he had grown up on a street called Utopia Road in a master-planned community in Southern California. Pleistocene Rewilding rekindled in him a longstanding fascination with utopian ideas, and h