Consider this radical notion: the environmental crisis is not all about gloom and doom. Instead, it is a door that opens up to a renewed vision of how we live and find happiness. It starts with a conversation about the question, “How much is enough?”

This conversation is vitally important because of some bad news. Technology alone won’t save us from environmental collapse. It will take four to five generations of technological innovation to achieve carbon-free production. Alas, we don’t have that much time. The Intergovernmental Panel on Climate Change says the atmosphere’s tipping point could come within the next few decades. If climate change is not reversed swiftly, its effects could prove irreversible.

The human population will hit seven billion within the next year. From remote Umbrian villages to the sprawling cities that house China’s growing middle class, many of...

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