With a game this deep, you'd think Meier put hundreds of hours into historical research, but it isn't so. "I tried to use fairly well-known concepts, well-known leaders, and well-known technologies," says Meier. "It wasn't intended to be 'bizarre facts about history.' It was intended to be something that anybody could play." When pressed, Meier does admit that he occasionally consulted a few "timeline of history" books, just to make sure he got the chronology of certain developments correct, or to make sure he spelled leaders' names right. But for the most part, the well-read Meier drew historical facts from his reserve of personal knowledge and understanding of history. Regarding research, Shelley proudly remembers a timeless lesson Meier taught him about historical game design: for a game to be fun, the details needn't be too in-depth or cerebral. "Everything we needed was pretty much available in the children’s section of the library," says Shelley.