What was the first theory put forth by an economist to explain the phenomena of business cycles?

Question

Quizplus · Accepted Answer

Jevons' sunspot theory, proposed by William Stanley Jevons in the 19th century, is considered one of the earliest theories to explain the phenomena of business cycles. Jevons suggested that periodic fluctuations in business activity could be linked to solar activity, specifically sunspots, affecting agricultural yields and thus economic activity.

What Was the First Theory Put Forth by an Economist