Agree to disagree

To "agree to disagree" is to resolve a conflict by having all parties tolerating but not accepting the opposing positions. It generally occurs when all sides recognize that further conflict would be unnecessary, ineffective or otherwise undesirable.

Origin

In 1770, the phrase "agree to disagree" appeared in print in its modern meaning when, at the death of George Whitefield, John Wesley wrote a memorial sermon which acknowledged but downplayed the two men's doctrinal differences:
In a subsequent letter to his brother Charles, Wesley attributed it to Whitefield : "If you agree with me, well: if not, we can, as Mr. Whitefield used to say, agree to disagree." Whitefield had used it in a letter as early as June 29, 1750.
Though Whitefield and Wesley appear to have popularized the expression in its usual meaning, it had appeared in print much earlier in a work by James Anderton, writing under the name of John Brereley, Priest, although his usage lacks the implication of tolerance of differing beliefs.

And as our learned adversaries do thus agree to disagree in their owne translations, mutually condemning each other...

The phrase "agree to differ" appeared in the early part of the 18th century in a sermon by John Piggott: "And now why should we not agree to differ, without either enmity or scorn?".