One people, fulfilled in Christ
There has always been one people of God. The church is not a replacement for Israel but Israel arriving at what it was always for, now opened to the nations.
What it claims
The promises were never to ethnicity as such. Paul says not all who are descended from Israel belong to Israel, and that the true children of Abraham are those who share his faith. Christ himself is the seed to whom the promises were made, so everyone in him inherits them. The tree in Romans 11 is one tree throughout, which is exactly the point: Gentiles do not get their own tree. On this reading the church does not take Israel's place, because the church is what Israel becomes when the Messiah comes and the nations stream in as the prophets said they would.
Who holds it
The majority position historically and today. Catholic and teaching, most Reformed and theology, Lutheran and Anglican traditions, and much of evangelicalism outside dispensational circles.
The texts it stands on
- Galatians 3:28-29 If you are Christ's, then you are Abraham's offspring and heirs according to promise.
- Ephesians 2:14-16 Christ made the two one and broke down the dividing wall, creating one new humanity in place of the two.
- Romans 9:6-8 Not all who are descended from Israel belong to Israel. Paul draws the distinction himself.
Strongest case
It reads the New Testament's own habit of applying Israel's titles to the church, chosen race, royal priesthood, holy nation, which are lifted from Exodus and Isaiah and handed to a mixed congregation. It also keeps one story rather than two running in parallel, which is how the New Testament writers plainly read their Bible.
Hardest question
In practice it slid into for most of church history, and the results were catastrophic. If the church simply is Israel, it becomes hard to say what Romans 11:29 is protecting, and easy to conclude that Jewish existence after Christ has no meaning, a conclusion Christians drew and acted on for centuries. Holders of this view today generally insist their position does not entail that, and the burden is on them to show how.