History of aspirin other studies from the 1960s to the 1980s established aspirin's efficacy as an anti-clotting agent that reduces the risk of clotting diseases. Aspirin sales revived considerably in the last decades of the twentieth century, and remain strong in the twenty-first with widespread use as a preventive treatment for heart attacks and strokes. Medicines derived from willow trees and other salicylate-rich plants have been part of pharmacopoeias at least dating back to ancient Sumer. The Ebers Papyrus, an Egyptian medical text from ca. 1543 BCE, mentions use of willow and myrtle (another salicylate-rich plant) to treat fever and pain. Willow bark
Parable of the Olive Tree the ground and nourished it. In time some new branches appeared, but the top of the tree began to perish. So the master of the vineyard instructed his servant to cut off the decayed branches, and replace them with grafts of wild olives. Meanwhile, natural branches of the tree were transplanted to other parts of the vineyard. In time the original tree, now with wild olive branches grafted onto it, grew to give good fruit. Those natural branches of the original tree that were transplanted into poor soil also grew to give good fruit. However, a natural branch of the