The disastrous extinction of mankind is the issue before us. It it no small affair of parlour politics we have to consider.
-The new world order by H.G. Wells
According to Cambridge Dictionary the word 'parlour' has two meanings.
- a business that provides a stated type of personal service or sells a stated product:
- (especially in the past) a room in a private house used for relaxing, especially one that was kept tidy for entertaining guests
I am going with the second option.
I think the author means that this not a small politic affair which we can discuss at parlour in our home.
But why the author used the word "have to"? Does anyone have to consider a politic affair at parlour?