Sustainability is a seemingly laudable goal - it tells us we need to live within our means, whether economic, ecological, or political - but it's insufficient for uncertain times. How can we live within our means when those very means can change, swiftly and unexpectedly, beneath us?
A hunk of beef raised on Scottish moorland has a very different ecological footprint from one created in an intensive feedlot using concentrated cereal feed, and a wild venison or rabbit casserole is arguably greener than a vegetable curry.
We need what I have often called an ecological approach to the management of these resources and we do not have that now. We have the inertia of past habits, unsustainable habits.
We can pay the ecological debt by changing economic models, and by giving up luxury consumption, setting aside selfishness and individualism, and thinking about the people and the planet Earth.
Life and families and babies are all joyous gifts. But if we do not begin to truly account for our numbers, we will surely create an ecological crisis that will only lead to anguish and despair.
If you look at the ecological circuitry of this planet, the ways in which materials like carbon or sulfur or phosphorous or nitrogen get cycled in ways that makes them available for our biology, the organisms that do the heavy lifting are bacteria.
We need the humbleness and clarity to see that our food, while benefitting from technological advances, has benefitted even more from free ecological resources: Cheap energy, lots of water everywhere, and a stable climate.
A hostility to modernity is shared by ideologies that have nothing else in common - a nostalgia for moral clarity, small-town intimacy, family values, primitive communism, ecological sustainability, communitarian solidarity, or harmonies with the rhythms of nature.
The ecological impact of book manufacture and traditional book marketing - I think that should really be considered. We have this industry in which we cut down trees to make the paper that we then use enormous amounts of electricity to turn into books that weigh a great deal and are then shipped enormous distances to point-of-sale retail.
There have been low moments before, but Christianity is an incredibly adaptable organism, using different parts of its repertoire to mutate into new ecological niches, yet preserving intact its story of grace, of love improbably triumphant.