A little hard to believe anyone in 40s/50s Europe felt particularly safe and comfortable!

Wrong. The situationist movement was politically active in the years leading up to 1968. The Society of the Spectacle was written in 1967.

A little hard to believe anyone in 60s Europe felt particularly safe and comfortable!

I don't know what to say then. Maybe study some history? Ask your parents?

https://en.m.wikipedia.org/wiki/Trente_Glorieuses

https://en.m.wikipedia.org/wiki/Wirtschaftswunder

https://en.m.wikipedia.org/wiki/Italian_economic_miracle

https://en.m.wikipedia.org/wiki/Post%E2%80%93World_War_II_ec...

Ah I see. I think if you read what situationists and the like actually said, you'd learn that such examples of rapid of capitalist growth is precisely the object of their critique!

Like it or not, many thinkers in this era do not see liberalism as a particularly powerful answer or conclusion to the terror of facism they lived through or inherited. Quite the opposite in fact! And situationism falls squarely in this camp.

I gather you would not agree, totally fine, but that is different than asserting "they just didn't know how lucky they already had it."

But then again, from your original comment, what has gone wrong since? Why have we forever lost our safety and comfort? If it is not something intrinsic to what began during such reconstructions, I wonder what external force you have in mind?