I've seen films from the 30s...and no-one, but no-one wore plus-fours...apart from the great Bob Hope...and he wasn't a cartoon character...neither was he a 16 year old international spy.
I also recall a scene in 'High Society' where Bing Crosby may have worn plus-fours, but I may be wrong because I spent most of the film yawning and wishing that I was watching the far superior Philadelphia Story, on which this poor, poor 'musical' was based.
16 year old kids certainly didn't run around in plus-fours.
Re: the day of rest...I welcomed the expansion of Sunday opening hours. I have no problem with it, because as you know, I'm a Godless soul who will be carrying his luggage on the 'down' escalator when I die.
There's little chance of 'my people' ever being let into heaven, so I may as well use my Sundays stocking up on food and going to the cinema.
Furthermore, I have never mown my lawn on a Sunday. That's a Saturday job.
Re: 'uncivilised and uneducated' - I just do not see them as synonyms. Here's why:
Say for instance you or I were dropped off a plane and told to live in the Gobi desert for a month...there are tribes there who are educated in ways that we aren't.
You and I would be dead within a week because our education has taught us how to wire a plug, how to conjugate the Spanish verb 'estar' and the names of the great kings and queens of Europe.
However, our education hasn't taught us which plants will kill us, and how to find underground sources of fresh drinking water.
Therefore the ideas of 'civilisation' and 'education' are, in my opinion, not interchangeable.