There comes a point in any genealogical backtrace when you realise that everyone in the world is now an ancestor of whoever you are studying. Generally, the researcher, politician, or random nutjob on YouTube then slides the window forward a few generations so that they can continue to make arbitrary claims like being of African descent (like everyone else), from native-born English stock (except for all those Anglo-Saxon immigrants that were born in Denmark and Germany), or that their oppone...
