As the title says, I'd like to know if alliances with AI in single-player Civilization VI are permanent.
Edit: To clarify what I mean by permanent: can the AI (or the player) break the alliance at any point until the end of the game? I'd like to know if I make an Alliance with an AI, does that take them off the table as an enemy? Can I pretty much ignore them as a threat or should I still keep an eye on them because they may back-stab me later?