Complex sentence: The Bible's own chronology places Abraham as living around 2000 BCE, but the stories in Genesis cannot be related to the known history of that time and most biblical histories no longer begin with this patriarchal period.
Split into simpler sentences: The Bible's own chronology places Abraham as living around 2000 BCE, but the stories in Genesis cannot be related to the known history of that time. Accordingly, most biblical histories no longer begin with this patriarchal period.