All people alive today have exactly the same ancestors at a time depth of 5,000 years.

Question

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It is estimated that roughly 5,000 years ago, the human population was small enough that every person alive at that time who left descendants is either an ancestor of everyone alive today or has no living descendants. Therefore, all people alive today have exactly the same ancestors at a time depth of 5,000 years. This is known as the Most Recent Common Ancestor (MRCA) or the Identical Ancestors Point (IAP).

All People Alive Today Have Exactly the Same Ancestors at a Time