Seems like a nice concept that even if humanity screws up in the biggest way possible and offs themselves, life will continue on and new life will take it's place. But I've never been much fond of post-apocalyptic settings, dystopia, or whatnot, although I think that cartoon presents a very bittersweet or soothing concept. I also like to imagine if humanity is ever threatened that badly, we'd come to our senses and realize what the possible outcomes can be. If that wasn't the case and nukes dropped, I imagine there'd be someone who'd lock themselves away with a plethora of humanity's knowledge and achievements waiting until they can pass it on or until things settle.
Reminds me of "Inherit the Earth", only in that, humanity becomes advanced enough to give other animals intelligence and seemingly leaves Earth behind. I also think it's incredibly ironic given the time period that "Peace on Earth" was made in, which is after the beginning of the Nazi Invasion of Poland and WW2, but before the bombing of Pearl Harbor and America's entrance into the war. And because of that, I think that cartoon will always seem political or commentary in nature because of the events that happened around it's time. In particular it seems somewhat preachy and I'm concerned how it seems to imply "war always bad, humanity bad, etc." Again, I think it's ironic if you consider that American intervention in WW1 and WW2 ended the war more quickly, preventing conflict from prolonging further, and preventing more lives from being lost. But that's enough dissection I suppose, I'm fine with politics in this thread, but I'd hate for it become politically charged into an argument.
There's already enough to talk about in pure worldbuilding implications of that cartoon. Like how the grandfather squirrel knew the words bomb or shell despite their society being peaceful, or how despite all humans being dead their society rapidly advanced from having no technology to having similar technology that took humans thousands of years to develop despite the animals only outside knowledge seemingly coming from the Bible. Or if the animals see themselves separate from "men" and men were monsters, why say "good will to men?" Or how Post too long. Click here to view the full text.