Utopia? Certainly more 'wild' and sustainable, with a much lower impact on the global environment. The idea comes from Life on the Brink: Environmentalists Confront Overpopulation.
https://www.amazon.com/Life-Brink-Environmentalists-Confront-Overpopulation/dp/0820343854
A collection of essays by leading environmentalists who fought the good fight against population overshoot and the destruction of the Biosphere for forty years and lost. To read Dave Foreman (founding member of Earth First) or Paul Watson (founding member of Greenpeace, founder of Sea Shepherds) rail against immigration into the USA or anywhere, and find others citing the malign influence of feminists and social justice activists is through-the-looking-glass, but it does beg a pointed question: If the Earth can no longer support human Progress, why do you continue to be Progressive? As a political category, Progressive is just as oxymoronic as Conservative has long been.