The United Arab Emirates is leaving OPEC, dealing the oil cartel another blow to its shrinking membership and power.

This departure marks the most serious exit OPEC has faced in recent years. The UAE joins a growing list of nations abandoning the organization, which once wielded enormous influence over global energy markets and prices.

The loss matters because OPEC's strength depends on member unity. Fewer members means less ability to coordinate production cuts, negotiate with rival oil producers, and control prices. The UAE's exit signals that even wealthy Gulf states no longer see enough value in membership to stay.

The cartel has already lost members. Iraq briefly left. Ecuador exited twice. Now the UAE, a major regional player with significant oil reserves, is walking away.

What happens next depends on whether other members follow. If the exodus continues, OPEC transforms from a force shaping global energy policy into a weakened group. Oil prices could become more volatile. Russia and other non-OPEC producers gain relative leverage.

For oil consumers, the development could mean less coordinated supply management. For the remaining OPEC members, it forces a reckoning about the organization's purpose in a world increasingly focused on renewable energy and climate concerns.