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“Revelation Six”, by Gustav Dore, 1880, approx. (Thanks to motif99 for the image) | 
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“Halley’s Comet”, newspaper editorial cartoon, artist unknown, 1910 | 
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“Soft Construction With Boiled Beans: Premonition Of Civil War”, by Salvador Dali, 1936 | 
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“Guernica”, by Pablo Picasso, 1937 | 
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The Watchtower Bible And Tract Society of NY & PA Yearly Calendar for 1938, Artist unknown (Thanks to Tallyman for the image) | 
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“Ecce Homo”, by Paul Delvaux, 1949 | 
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“On No Account...”, editorial cartoon by Cummings, 1945-1955 approx. | 
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“It Can Happen Here”, 1950’s Civil Defense poster |  
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“It’s Atomic!”, magazine cartoon, by “B.B.”, approx. 1950’s | 
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“War of the Worlds” lobby card, George Pal version, 1953 | 
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Detail from “Apocalyptic Scene With Philosophers And Historical Figures” by McKendree Robbins Long, late 1960’s, approx. |