Neither

Calvinist and Arminian theologies have been in conflict within the Christian church for 400 years.

Calvinism says that God is powerful enough to save all people, but doesn't.

Arminianism says that God desires all people to be saved, but isn't able to accomplish it.

Universal reconciliation says that God desires all people to be saved, and that He accomplishes it.

Universal reconciliation is neither Calvinistic nor Arminian. And, if true, it resolves a four century old conflict in the church.