How about the idea that this is a parallel universe where the humans lost?No, sorry, not idea, the other one. Fact. Fact is the word. Firaxis's designer said so, can't remember where off the top of my head, I'll dig it up and link to it later.
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"She's old, she's lame, she's barren too, // "She's not worth feed or hay, // "But I'll give her this," - he blew smoke at me - // "She was something in her day." -- Garnet Rogers, Small Victory
FiMFiction.net: we might accept blatant porn involving the cast of My Little Pony but as God is my witness we have standards.