Christians took an old-earth position from the early 20th century (for instance, those holding the gap theory), but that did not guarantee a slide into unbelief. Mortenson could have profitably included some references to astronomers and physicists from the same period to show where the other sciences were on the issues. Mortenson is right, however, in saying that compromise with long-age uniformitarianism is unnecessary, as even modern secular geologists have suggested catastrophism as a prominent