Some environmental and climate policies are baked into law, and are hard to reverse. A right-wing Commission is looking at ten-fifteen years before it replaces key personnel and learns the ropes to dismantle that.
We have no need to invent any new legal institution. The extant legal palette of property rights includes a lot of shared forms of ownerships other than freehold, for example community land trust, cooperative ownership of businesses etc. We will see these shared forms, which already exist in our society, become more important.