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a. The doctrine that major changes in the earth's crust result from sudden catastrophes, such as the impact of a large meteor, rather than from gradual evolutionary processes.
b. The doctrine that changes in the earth's fauna and flora result from major catastrophic events that cause the die-off of many organisms and are followed by the appearance of new types of organisms.
2. The prediction or expectation of cataclysmic upheaval, as in political or social developments.

ca·tas′tro·phist n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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"I didn't commit murder," continued the Catastrophist mildly, "but only perjury.
Scientific descendants for this view begin with "catastrophist" accounts of natural history associated with Georges Cuvier and Louis Agassiz in the 19th century, which interpreted the stratified character of the fossil record (i.e.
I will raise just three key points aimed at dismantling the foundations of this new catastrophist cult.
Cuvier (1769-1832) was the leading catastrophist of his age and had noticed in mapping the Paris Basin with his colleague Alexandre Brongniart that many fossil groups appeared to die out at unconformities.
Paradoxically, though, the first ode to occupied Warsaw was written not by one of the Skamandrists (most of whom fled to the West in 1939), but by the usually unsentimental "catastrophist" Czeslaw Mitosz.
Books shortlisted are: Novel Award The Catastrophist by Ronan Bennett (Headline Review); Leading The Cheers by Justin Cartwright (Sceptre); The Travelling Hornplayer by Barbara Trapido (Hamish Hamilton).
In a passage remarkable for its brilliance and connections with catastrophist theories challenging the doctrine of uniformity (the latter as expounded by James Hutton and Charles Lyell, whose works became later the foundation of Charles Darwin's concept of natural selection, underlying which was the idea of very slow evolution; see Velikovsky 2009: 211ff), Lionel gives the following answer to the questions above:
Early in his career, Sedgwick (and most other geologists) held a catastrophist view that the earth's surface was shaped by sudden, short-lived, violent events that were sometimes worldwide in scope--among them Noah's flood.
Milosz himself would argue-and has argued, on more than one occasion- that his verse, indeed his writing in general, is not at all negative, apocalyptic, "catastrophist," but rather a search for the positive, the affirmative, the promise of hope.
founder Dave Foreman's praise of AIDS and African famine as badly needed population controls; the late Edward Abbey's blatant immigrant bashing; the popularity of the writings of neo-Malthusian catastrophist Robert Kaplan; and population-control zealots ranting about overly fertile Third World women while avoiding hard questions about overconsumption in their own countries.
Written at the end of World War I, The Waste Land is a "catastrophist" poem dealing with the collapse of European culture, a view that was philosophically close to Milosz and expressed both in his prewar catastrophist verse and in several poems written during the war, such as "The Outskirts," where specifically Polish experience becomes a symbolic image of all Europe at the time.