This volume of essays is designed to fill an existing gap in the literature devoted to modern British naval history by providing a scholarly analysis of the First Sea Lords from the time of Admiral Fisher to that of Earl Mountbatten. Apart from assessing the role and performance in office of the individual First Sea Lords from the time of the Entente Cordiale in 1904 to the heyday of the Macmillan premiership in 1959, this book also reveals the extent of the influence each of these experienced sailor-administrators exerted upon British naval policy-making in the 20th century. Strongly rooted in primary as distinct from purely secondary source material, these essays are informative, fair and balanced portrayals of the individual First Sea Lords and the impact they have had upon both the Admiralty's administrative and strategic domains. Written by a range of established and emerging naval historians from around the world, this book gives praise where it is due, but it is also sharply critical of the shortcomings of those who, once installed in office, did precious little.