How 50 People Became 35 Million Descendants

The Mayflower landed with 102 passengers. Half died that first winter. Yet today, an estimated 35 million Americans can trace their lineage to those 50 survivors. How does that math work? In this episode, we break down the exponential population growth, the marriage patterns that spread Mayflower DNA across the continent, and why the real number is likely much higher. Then we turn to Ellis Island, where 12 million immigrants processed between 1892 and 1924 created a different kind of genealogical legacy — one that touches roughly 40% of living Americans. We explore the founder effects, the filtering mechanisms, and the myths that surround both migration stories.