388. Ivory is an excelent anti-depressive.
Umm... Before the advent of plastic, what did you think certain female sex toys were made of?
What do you think piano keys were made from? The white ones were ivory. So, your civ gets happier with ivory because they can all play the piano and go dancing.
And when the ivory expired after industrialism and they then discovered plastics, they started building pianos with plastic keys.
And yet only ivory keyed pianos make people happy. They stay sad if the keys are made from plastic.
383. The Dutch were really advanced seeing as they had steam power in the Middle Ages.
384. Japan can't be one of the world's largest coal importers as they can only burn oil shale, build dams, and hopefully one day stop using nuclear engergy to produce electricity.
385. All theaters are outdoors, and are built in the Greek style.
396. If a rifleman batallion of say 1000 soldiers, in the middle of enemy lands, gets attacked and loses 500 man, those dead soldiers will miraculously revive if you wait long enough.