"The thing that I would say is that U.S. power is not eternal. I am not saying that it won't come to an end. Because it will"

Robert Kagan's quote is a suggestion that the United States' power is not boundless. He is cautioning that the U.S. will not remain the world's superpower permanently. He is suggesting that the U.S. must not take its power for granted and must utilize it properly. He is likewise suggesting that the U.S. needs to be aware of the potential for its power to decrease and ought to be prepared for that eventuality. Kagan's quote is a reminder that the U.S. should not end up being contented and should strive to keep its power and influence on the planet. It is likewise a suggestion that the U.S. must be aware of the capacity for its power to decline and must be prepared for that possibility.