I guess it's appropriate that modern Malthusianism is a left religious movement. After all Malthus was an Anglican Divine.

Paul Krugman's religious raving about "peak oil" after fracking had already negated the concept for at least a century illustrates this. Krugman had only to ask someone in the oil industry to have his faith in scarcity contradicted. But it was more important to demonstrate faith than be "right". Ravings at the link.