The first abolition of slavery with a proclaimed ideology was, as far as I’ve been able to find, by Louis the Quarrelsome in 1315 ‘comme selon le droit de nature chacun doit naistre franc’ (well, there may have been some insincerity and the text appears to be disputed). This ideology is not really due to the Jewish or Christian scriptures but to Roman legal theory emerging from Stoic philosophy, as RoHa has noted. Seneca’s ‘one human being is a sacred thing to another’ comes close to being a founding statement of the sanctity of life in a reasonable sense of that term. Prohibition of murder is found in the Laws of Ur-Nammu, which is, as Zionists like to say, 4,000 years old. Those of us who have moral roots in the Bible, such as Bari Weiss and me, have to recognise that it is a document which legitimates at least some forms of slavery and that we do owe something to the polytheists. Karl Barth would come down on me like a ton of bricks.