Why did the northern tribes leave the kingdom of Israel?

A:According to The Bible, Solomon demonstrated no political wisdom, nor even sufficient common sense to govern wisely in the interests of his own son's succession to the throne of the United Monarchy, Israel. The Bible tells us that Solomon's reckless spending and swingeing taxes, arrogantly maintained by his son, Rehoboam, were the cause of the breakup of the United Monarchy. One would expect that Rehoboam would have continued to use the name Israel for his much-diminished kingdom, but somehow everyone amicably agreed that this name would go to the breakaway northern kingdom, even as Rehoboam fought to bring it back under his control.

On the other hand, many archaeologists say they can find no evidence that there ever was a United Monarchy. All the evidence points to Israel and Judah always having been separate.