We all value too highly the immunity which this country has so long enjoyed from the horrors of an invaded land to endanger it for lack of timely prevision. That immunity at its very lowest has been for generations, and still is, a great national asset. It has undoubtedly given us the tranquillity and the security which has enabled us to build up our great national wealth. It is an essential part of that wealth. At the highest it means an inviolable guarantee for our national freedom and independence... We do not intend to put in jeopardy the naval supremacy which is so essential not only to our national existence, but, in our judgment, to the vital interests of Western civilisation.