‘Half-Earth Socialism’ is a radical call to action to save the planet, including trenchant proposals to rewild half the earth to absorb carbon emissions and restore biodiversity; rapidly transition to renewable energy, paired with drastic cuts in consumption; and shift to global veganism to reduce energy and land use. As this thrilling and provocative book makes clear, we must humbly accept that humanity cannot fully understand or control the earth – but we can plan new energy systems, large-scale rewilding, and food production for the common good.