The first known legal use of the phrase act of God was in a 1581 English case concerning property inheritance. It referred, in that instance, to death, declared by the judge to be among “those things which are inevitable by the act of God, which no industry can avoid, nor policy prevent.”

Accounts varied of the Great Famine of 1315–22, during which more than 10 percent of Europe’s population died. In Flanders: “Parents killed their children and children killed parents, and the bodies of executed criminals were eagerly snatched from the gallows.” In France: “There was no wine in the whole kingdom.”

The first mass extinction on earth occurred around 2.5 billion years ago, when a photosynthesizing bacterium appeared and released so much oxygen into the atmosphere that anaerobic life was largely wiped out. This is often called the Great Oxygenation Event, the Oxygen Catastrophe, or the Oxygen Holocaust. 

Astrologers of the Ayyubid Empire predicted in 1186 that the world would end September 16 of that year; a dust storm, stirred up by planetary alignment, would scour the earth of life. Sultan Saladin criticized the “feeble minds” of believers and planned an open-air, candlelit party for that evening. “We never saw a night as calm as that,” an attendee later remarked.

In 1919 a steel storage tank burst in Boston and spilled 2.3 million gallons of molasses, creating a twenty-five-foot-high wave that killed twenty-one people and tore buildings from foundations. The tank had leaked since its installation, but the company had, in response to complaints, merely painted it a concealing brown.