F.E. Smith Lord Birkenhead
The End is Nigh: British Politics, Power, and the Road to the Second World War, by Robert Crowcroft
Both Churchill and Chamberlain understood that Nazi Germany was a time bomb. But whereas Chamberlain imagined that it could be defused by diplomacy, Churchill believed that it could only be defused by force, or the threat of force. When the diplomacy of appeasement failed Chamberlain was compelled to accept—albeit with the profound reluctance of a man who loathed war—that no other response was possible. In the final analysis the British Empire, which was already in decline, had to be sacrificed so that Britain itself could live.