I’m reading ‘A New Heaven and a New Earth’ by J. Richard Middleton, and therein he makes the Wright-esque claim that Abraham’s family was called to ‘set things to rights’ or some variant on that theme – to paraphrase Middleton, it is through Abraham’s family that the nations will be blessed or find blessing. While there is indeed a sense in which this is true, I do not think that it is true in the sense that Middleton wants it to be, namely that such blessings and calling relate to salvation.
As I read the verses which Middleton cites in defense of this thesis (Gen. 12:1-3, 18:17-18, 22:17-18, 26:4-5, 28:14) I’m struck by a couple of things, the first of which is this: the promises to Abraham from God are all that those in his seed or in him (in Abraham) will be blessed. I see this, off the top of my head, as pointing to or anticipating when Jews and Gentiles will be part of the one family of Abraham and not a declaration that Abraham’s family is the agent by which redemptive blessings flow.
Secondly, I really see very little evidence that Abraham’s family was called to set to rights the problem of Adam’s sin or undo Adam’s sin. I honestly think one has to strain fairly hard to really get that from the Genesis texts – the overwhelming sense I get is that Abraham’s family is called to be a witness/light to the nations, not the bearers of salvation. Salvation will come through Israel, not from Israel. In a word, Abraham’s family is not called to be the agent of salvation but a light to the nations and a witness to the One God – neither of which is the same as being the world’s saviour.
There is, it seems to me, an eschatalogical element here in that, as noted above, the promises of God to Abraham look ahead to when in the fullness of time both Jew and Gentile will be brought into the one family of God. These are cursory sketches and stand in need of development but the basic gist should be clear: the thesis that Israel is the means by which the world is set to rights at the very least can be challenged on the grounds of textual evidence
For a more developed critique along these lines, see this helpful summary of Hurtado and Witherington’s thoughts.