Page "Identical ancestors point" Paragraph 4

Because ancestors of the MRCA are by definition also common ancestors, we can continue to find ( less recent ) common ancestors by pushing further back in time to more and more ancient common ancestors of all people alive today.

Eventually we will reach a point in the past where all humans can be divided into two groups: those who left no descendants today and those who are common ancestors of all living humans today.

This point in time is termed the identical ancestors point.

Even though each living person receives genes in dramatically different proportions from these ancestors from the identical ancestors point, all living people share exactly the same set of ancestors from this point back, all the way to the very first single-celled organism.