Early genetic studies of the origins of Europeans often present superficial conclusions based on sparse data that have not been subjected to serious scientific analysis. DNA genealogy has not only enabled us to reconstruct patterns of migration and settlement in ancient Europe, but has also allowed us to subject leading linguistic theories to close scrutiny. We were able to disprove the barrow theory and the Paleolithic continuity theory, and challenge the "African exit" hypothesis. We also succeeded in refining the Wasconian and Anatolian theories.