More Wikipedia BS attacking The Bible

Though from the point of view of an increasing majority of archaeologists, there were always two distinct cultures in Canaan, a strong and prosperous northern kingdom and a weaker and poorer southern one,  in the Biblical account the Israelite tribes were initially united in a single kingdom, and only later fractured into the northern and southern kingdoms; this fracture is blamed by the Bible on the jealousy of Ephraim over the growing power of Judah.

This is a massive over simplification of the Biblical Narrative.  It ignores the Judges period where the various Northern Tribes and Judah are all very distinct.  As well as the division between north and south during the first 7 years of David’s reign.  The Judges period also tended to have the dominant leaders be northern, coming from Ephraim or Manasseh.