Why did Jacques-Louis David become a leading Neoclassical painter?

Jacques-Louis David became the leading figure of Neoclassicism by rejecting the decorative Rococo style in favor of the austere, moral, and rational principles of Classical antiquity.123

His transition was driven by several key factors:

• Academic Training and Exposure: After winning the Prix de Rome in 1774, David spent years in Italy studying Italian painting and visiting archaeological sites like Pompeii and Herculaneum. He described this experience as having his "cataract" removed, allowing him to fully embrace the "noble simplicity and quiet grandeur" advocated by scholars like Johann Joachim Winckelmann.452
• Artistic Manifesto: His 1784 painting, Oath of the Horatii, served as a powerful manifesto for this new style. Its use of firm contours, sober colors, and frieze-like composition emphasized stoic, patriotic virtues that contrasted sharply with the "effete" nature of the aristocracy.3
• Political Alignment: David masterfully linked his classical aesthetic to contemporary politics. By depicting historical themes as analogies for revolutionary ideals, he positioned himself as a "culture hero" and the primary visual voice of the French Revolution and later Napoleon.163