The beginning of the 20th century was the stage for Mahan's concepts for seapower, and while his basic tenets are still relevant, the environment in which they must be applied has witnessed a significant change.
McNulty, James F.
"Focus on Seapower: A Perspective of the First Naval War College Seapower Symposium,"
Naval War College Review: Vol. 23
, Article 4.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol23/iss3/4