Friend of the show Keith Pluymers returned for a great chat about fuel, environmental history, and why the seventeenth century is worth studying.You can listen to the back catalog of Tides of History, completely ad-free, only on Stitcher Premium. For a free month of Stitcher Premium, go to stitcherpremium.com/wondery and use promo code WONDERY.Support this show by supporting our sponsors!Cayman Jack - Cayman Jack provides premium prepared cocktails for those with good taste and little time. Find Cayman Jack at a store near you by visiting caymanjack.com. Please drink responsibly. Premium malt beverage. American Vintage Beverage Co. Chicago, Illinois.Robinhood - Tides listeners are getting a free stock from Robinhood! Just visit tides.robinhood.comto get started.Roman - Get checked out. Go to GetRoman.com/Tides for a free visit.Linzess - Learn about ways to make your life a little happier. Visit OhMyGut.info/podcast.