Quotes from Joseph Blenkinsopp

Rather than Jethro's conversion to Yahwism, therefore, [in Exod. 18] we are witnessing 'the first incorporation of the Israelite leaders into the worship of Yahweh'. (p. 135) (from 'The Midianite-Kenite Hypothesis Revisited and the Origins of Judah', JSOT 33.2 (2008): 131-153)