One of the purposes religion serves (note: this has nothing to do with whether any particular religion is true) is to address this belief in mankind. To take one example, it just makes sense to us when we hear we are the children of God rather than just one of many animal species. Children of God are obviously important in the grand scheme of things in a way random animal species are not. This satisfies our belief in our fundamental importance and addresses "how" we're important in a very satisfying way.

To me this doesn't seem a minor aspect of human nature, but a rather important one. We have a long history of grasping for explanations about our own importance, seemingly needing to believe even when those explanations bring us misery and despair. This has long been a criticism leveled at some religions (e.g. teachings about sin and eternal damnation make people's lives more miserable than they would otherwise be), but I think the observation goes well beyond religion, appearing with just as much frequency and intensity among the agnostic and atheistic. Everyone needs to understand their place in the universe, and conclusions that we’re just not that important do not suffice.
And that brings us to the modern Green movement. Stewardship of the environment is not a new concept. There are plenty of precedents in history across many cultures. But something seems different about the modern Greens. It's widely noted that they seem to regard their interaction with the environment in ways that draw comparisons to the way Christians regard sin and salvation. The simplest explanation for this seems to be that, in a post-Christian world, environmentalism has become a new religion.
I don't find that explanation quite satisfactory. It's not that environmentalism is a religion. It's that environmentalism is motivated by the same basic need in mankind to understand their importance. This makes it attractive, not only to atheists and other kinds of unbelievers, but to anyone finding insufficient explanation for the importance of mankind in their other beliefs.
There's good reason you see a strong Green presence among the more progressive churches. It's not that they have abandoned belief in God. It's that they've abandoned those teachings that made mankind seem particularly important in God's grand scheme of the universe. Modern environmentalism provides that. This has practical importance for its adherents that can be summarized in one word: meaning.
A traditional Catholic may find meaning in attending daily mass, participating in the sacraments, perhaps saying the rosary. They believe this is a means of perfecting their soul and working toward salvation and eternal life. In the same way a Green might find meaning in recycling, choosing to purchase organic or sustainable products, and finding ways to lower their carbon footprint. In both cases adherents have a very tangible sense that their everyday actions are connected to a larger purpose. Even more, they believe that the accumulation of such actions over their lives is something of real importance - not just to themselves, but in the grand scheme of the whole world. Their life therefore matters in a very tangible way.
But as this belief in mankind's importance is not derived by rational understanding, but rather arrives as an a priori belief escaping examination, it has a tendency to distort thoughts upon which it is based.
Dr. Roy Spencer makes an interesting observation about a problem with climate models that examines exactly this sort of distortion. Bold emphases mine below (the italics are Spencer’s):
It turns out that the modelers have made a critical assumption that ends up leading to the their conclusion that the climate system is very sensitive to our greenhouse gas emissions: that the climate system was in a state of energy balance in the first place.
There is a pervasive, non-scientific belief in the Earth sciences that nature is in a fragile state of balance. Whether it is ecosystems or the climate systems, you will hear or read scientists claims about the supposed fragility of nature.
But this is a subjective concept, not a scientific one. Still, it makes its way into the scientific literature (read the abstract to this seminal paper on the first satellite measurements of the Earth’s energy budget…look for “delicately balanced”). Just because nature tends toward a balance does not mean that balance is in any way ‘fragile’. And what does ‘fragile’ even mean when nature itself is always upsetting that balance anyway?
Why is this important to climate modeling? Because if climate researchers ignore naturally-induced climate variability, and instead assume that most climate changes are due to the activity of humans, they will inevitably come to the conclusion that the climate system is fragile: that is, that feedbacks are positive. It’s a little like some ancient tribe of people believing that severe weather events are the result of their moral transgressions.
I would argue it’s a LOT like some ancient tribe of people believing that severe weather events are the result of their moral transgressions. But it’s also a lot like traditional Catholics meticulously listing every sin they can think of to their parish priest before taking weekly communion. And it’s also a lot like workers in the Soviet Union being celebrated as champions of the people for performing the most menial chores. All are examples of mankind’s need to find meaning in their lives based on an underlying assumption that the meaning must be in there somewhere.
And this far more than anything else is why it’s so difficult to shift the thinking of global warming alarmists. It’s the reason they contradict their professed belief in science with non-scientific assertions of “consensus,” and “the debate is over,” and “it’s beyond questioning.” If it is shown that all the industry of mankind at the height of our industrial progress and greatest extent of our population makes a collective impact more like a whisper than a shout upon our planet, what does that say about our own importance? Surely mankind’s powers are greater than that! Surely we must take care lest our very negligence destroy the world itself!
But maybe not. Maybe the world is far greater and we far smaller than we’d care to believe. Maybe searching for greater meaning in the natural world, a world in which we are ultimately just collections of atoms drifting through time, was always a fools errand.
Does it really matter whether we’re finding meaning in the recycling bin rather than the rubbish heap? Both place our importance squarely in the material world, and perhaps that’s not the proper place to be looking for meaning at all.



