How far back does the oldest family tree go?

The oldest known family tree dates back to around 4,000 years ago and is recorded on a clay tablet from ancient Mesopotamia. This early genealogical record documents the lineage of the Sumerian king, and it highlights the importance of ancestry in early civilizations. Additionally, various family trees from other ancient cultures, such as those in Egypt and China, also exist, demonstrating the long-standing human interest in genealogy.