Nothing affects public health in the United States more than food. Gun violence kills tens of thousands of Americans a year. Heart disease, cancer, stroke and diabetes kill more than a million people a year — nearly half of all deaths — and diet is a root cause of many of those diseases.

And the root of that dangerous diet is our system of hyper-industrial agriculture, the kind that uses 10 times as much energy as it produces.

We must figure out a way to un-invent this food system. It’s been a major contributor to climate change, spawned the obesity crisis, poisoned countless volumes of land and water, wasted energy, tortured billions of animals… I could go on. The point is that “sustainability” is not only possible but essential: only by saving the earth can we save ourselves, and vice versa.

How do we do that?

This seems like a good day to step back a bit and suggest something that’s sometimes difficult to accept.

Patience.

We can only dismantle this system little by little, and slowly. Change takes time. Often — usually — that time exceeds the life span of its pioneers.