I didn't know anyone doubted it.
jocon307: "so, who thought this wasnt true?
I thought David & Solomon were historical figures, or I am just dumb?"
The usual term is "biblical minimalists": ideas presented by scholars the likes of Israel Finkelstein, Niels Peter Lemche and Thomas L. Thompson at the University of Copenhagen, Philip R. Davies, and Keith Whitelam.
These scholars took (or take) the position: nothing in the Bible can be believed unless it is independently attested to.
For New Testament "minamalists" you can look at John Dominick Crossan's "Jesus Seminar".
For the works of scholars opposed to "minimalism", I highly recommend the magazine, "Biblical Archaeology Review"