Archeologists recently discovered a Hebrew inscription on a piece of pottery that dates to the 10th Century B.C. It is the oldest Hebrew writing ever discovered.
In English it reads (by numbered line):
1′ you shall not do [it], but worship the [Lord].
2′ Judge the sla[ve] and the wid[ow] / Judge the orph[an]
3′ [and] the stranger. [Pl]ead for the infant / plead for the po[or and]
4′ the widow. Rehabilitate [the poor] at the hands of the king.
5′ Protect the po[or and] the slave / [supp]ort the stranger.
These specific words do not come from any specific text in the Old Testament (which was likely written several centuries later), but they echo themes found throughout it: Plead for the infant and widow. Protect strangers, the poor, the disinfranchised.
So 3,000 years ago what was on the Hebrew mind? Social justice.