The Genetic Mutation of the Indo European Language

Geneticists believe that this particular genetic mutation tended to occur when early humans began to domesticate cattle and other milk producing animals. This type of farming is far more efficient than raising cattle for slaughter. It produces five times as many calories per acre. As dairy farmers, indo european speakers would have also had the advantage of mobility. But it would not have been an advantage against established cities like those in sumaria and mesopotamia.