Yogurt has been consumed since the time of the ancient Egyptians and Israelites. The "milk" that flowed in the Promised Land alongside honey was likely a fermented milk drink. It's been a staple in the Middle East, South Asia, Central Asia, and Eastern Europe Even the classical Greeks had their own form of yogurt, but despite this, yogurt didn't spread into Western Europe nor did it become popular in East Asia until fairly modern times. How early can yogurt become popular in the far West and the far East, and what effects will it have on history?