A new paper reaffirms how humankind's embrace of agriculture, and resulting lower 'cost' of food, led to a cultural boom that resulted in mass migration and many of the world's major language families.
If you speak modern Japanese, Korean, Turkish and Mongolian, you have a connection to neolithic millet farmers from the Liao River valley - Inner Mongolia and the provinces of Liaoning and Jilin in China. People speaking nearly 100 dialects and languages across 5,000 miles have a shared genetic ancestry stretching back 9,000 years, the research found.