The Anglosphere is protected by oceans.
Which increases our security, but allows our leaders to be more careless and reckless
Oceans are also a way of projecting power.
See Mahan, “The Influence of Sea Power upon History”
If the US can only deal with unfriendly ports on the other side of the oceans, it is isolated and economically crippled. At the same time its competitors will own the Earths economy and its resources, and become vastly more powerful.