Pub curfews were also introduced in the war were they not? Maybe we should reconsider these decisions!As far as I know, it was first introduced as a temporary war time measure in 1916 - in the middle of the First World War (and a year before the US joined the Allies) in the UK.
Personally, I dislike it for what it represents - the imminent appearance or arrival of winter, which I loathe, - rather than the actual fact of the clock being put back by an hour during the winter months. But then, I deeply dislike anything that calls winter to mind, and this is not something that clocks, or time regulation, can control (or assuage).
The thinking was to ensure that mornings remained more or less bright (which suited factories, and war work, and commercial imperatives) for longer than would have been the case had the clocks not been put back by an hour.
Although the one that bothers me most is motorway speeds. In the 60’s they introduced 70 MPH max speed. But I’d rather do 100 in a modern car than 60 in most cars from the 60’s!