The billionaire owner of The Washington Post is directing its opinion section to defend personal liberties and the free market in a shift that prompted the editor of that page to resign.

In an email and social media post, Jeff Bezos outlined dramatic changes to The Washington Post’s opinions section, and announced that opinions editor David Shipley has resigned.

Current and former Washington Post staffers are rebelling against Jeff Bezos after he announced a “significant” editorial shift that will see the paper’s Opinion section focus almost exclusively on personal liberties and free markets.