Today, George Cardinal Pell delivered a lecture at the invitation of the Global Warming Policy Foundation titled “Eppur’ si muove, or ‘yet it moves:’ One Christian Perspective on Climate Change.” He insisted that a scientific consensus is a lazy basis for the making of policy, and that before states impose drastic environmental regulations, an analysis of their demonstrable costs and benefits must be undertaken.

Galileo is supposed to have muttered the lecture’s title after recanting his heliocentrism in the face of a “scientific consensus.” Cardinal Pell spent a large portion of his lecture demonstrating the historical existence of a Medieval warm period which in the last ten years the green movement has tried to explain away, since it’s rather inconvenient to find that pre-industrial man lived in a hotter climate when you want to assert that carbon emissions must be causing current global warming. “And yet, it was warm,” the Cardinal is saying.

Cardinal Pell began with the Tower of Babel, and quoted Leon Kass’s description of that project as “the all-too-human, prideful attempt at self-creation.” Before making any sort of climate policy, the Cardinal warned,

we should ask whether our attempts at global climate control are within human capacity, (that is, the projected human imperium); or on the other hand, are likely to be as misdirected and ineffective as the construction of the famous tower in the temple of Marduk, Babylon’s chief god.

…

Where is the borderline separating us from what is beyond human power? Where does scientific striving e uneconomic, immoral or ineffectual and so lapse into hubris?

Even more dangerous than ineffectual scientific striving is ineffectual unscientific striving, which what we have when policy is made based not on scientific finding, but on scientific consensus. Of this consensus, Cardinal Pell says it “is a category error, scientifically and philosophically. In fact it is also a cop-out, a way of avoiding the basic issues.” He goes on:

What is important and what needs to be examined by lay people as well as scientists is the evidence and argumentation which are adduced to back any consensus. The basic issue is not whether the science is settled but whether the evidence and explanations are adequate in that paradigm.

Thomas Aquinas pointed this out long ago explaining that “the argument from authority based on human reason” is the weakest form of argument, always liable to logical refutation. [Summa I, 1, 8 ad 2]

Then the Cardinal goes into his lengthy defense of the Medieval warm period, which you may read for yourself in the full text of his speech.

After poking a hole in the green lobby’s weather balloon, Cardinal Pell makes his appeal to lawmakers and bureaucrats.

A final point to be noted in this struggle to convince public opinion is that the language used by AGW proponents veers towards that of primitive religious controversy. Believers are contrasted with deniers, doubters and sceptics, although I must confess no one has dubbed me a climate change heretic.

The rewards for proper environmental behaviour are uncertain, unlike the grim scenarios for the future as a result of human irresponsibility which have a dash of the apocalyptic about them, even of the horsemen of the Apocalypse. The immense financial costs true-believers would impose on economies can pared with the sacrifices offered traditionally in religion, and the sale of carbon credits with the pre-Reformation practice of selling indulgences. Some of those campaigning to save the planet are not merely zealous but zealots. To the religionless and spiritually rootless, mythology — forting or forting — can be magnetically, even pathologically, attractive.

For this reason (among others) I support the mendation of Bjorn Lomborg and Bob Carter [in The Australian] that, rather than spending money on meeting the Kyoto Protocol which would have produced an indiscernible effect on temperature rise, money should be used to raise living standards and reduce vulnerability to catastrophes and climate change (in whatever direction), so helping people to cope better with future challenges.

It is folly, the Cardinal says, to rush into climate regulation efforts of little proveable benefit when their cost will be extreme. The city of Athens spent half its GDP building the Parthenon, and after eleven years of work had a fantastically beautiful temple to show for its expense. Al Gore hasn’t yet called for a 50 percent green tax, but when he does, will a two degree drop in summer temperatures be worth it?

The text of the speech was released at 3:15 ET and will soon be on the Archdiocese of Syndey’s website. We’ll link it here when it’s up.