As we know there were those both in the Conservative Party and in Labour who opposed the Lloyd George government to support France’s ally in 1938.
Of course the war looks like a victory. As we know Nazi Germany was defeated by the combination of the British Blockade, initial Czech resistance and then by the Polish intervention with Czech munitions.
We know that a Hitler emerged from Versailles. There has now been decades of resentment to the still harsher Peace. Yes Aeschylus was permitted. Many people regard the Hapsburg Holy Roman Emporship of a united Germany and Austria as being almost a puppet of France.
Nor should we forget that the War distracted the West when Stalin took Estonia, Lithuania and Latvia and nearly Finland.
Perhaps the now mighty Poland is an important bulwark against the USSR, especially with its close now close to links Czechoslovakia.
Some said the war was for Democracy. Well yes Czechoslovakia kind of qualifies- though it was as enthusiastic as Poland was in its newly acquired territories of East Prussia and Danzig (sorry Gdansk) about expelling any ethnic Germans who did not show total loyalty.
What if there had been no such war? I have heard it claimed that Hitler could have threatened all Europe, but surely that is crazy.
Is it desirable that Italy be so powerful in the Mediterranean and the Horn of Africa, especially when allied to their fellow Fascists in Spain?
Might the Japanese have attacked European as well as US colonies had there been, as some have suggested, a later bloodier war in Europe?