Read something old:
If a service does not possess a well-defined strategic concept, the public and political leaders will be confused as to the role of the service . . . and apathetic or hostile to the claims made by the service on the resources of society.” And specifically of the Navy, “What function do you perform which obligates society to assume responsibility for your maintenance?”
A long read for a blog post, but Huntington’s 1954 observations are as germane today as Mahan’s were throughout the first half of the last century.