I bought the original Civilization because I was interested in history.
At the time I didn't even know that there was such a thing as TBS or even strategy gaming. I just thought, hey cool...a game that simulates the history of mankind.
So my answer would be a definate yes.
But come to think of it, that is the only game...no wait...I bought BOTF because I like Star Trek...but on the other hand I knew it was TBS, and wouldn't have bought it otherwise...does that count?