The essence of the left's political grip on three generations has been to distill completely irrational ideas into short catchy slogans. The slogans take about two seconds to recite and about five minutes to properly disprove. This intersection of advertising logic and propaganda has enabled the left to pollute our political culture with dangerously insipid slogans, many that impact our moral justification for defending ourselves such as, "We need to be better than them", "War is never the answer" or that all time classic, "The ends can never justify the means."
the slogan argues that all war is wrong. Huxley took this literally boldly addressing large anti-war rallies in England, not long before Hitler rendered the point moot by demonstrating that no matter how much one side may not want a war-- sooner or later when confronted by a ruthless enemy it will have a choice between becoming slaves or fighting a war.