Environmentalists say our species' addiction to consumption is responsible for climate change and a host of other environment ills. It's also a driving economic force. Can we reconcile the two?

Welfare, communal sharing, volunteering, open-source innovation — and a shift from fulfillment measured in the accumulation of shiny baubles toward more intrinsic human values — all have a role to play.

According to UN-commissioned report, which is to inform the 2019 UN Global Sustainable Development Report, capitalism, at least in its current form, just isn't up to the job of tackling climate change, pointing out that "dramatic reductions in emissions at current high levels of consumption are very challenging, if not impossible."