Here's why:
* No Official Sales Data: Reliable, publicly available sales figures for board games from that era are rare.
* Monopoly's Dominance: Monopoly has been a top seller for decades, and even if another game did outsell it in a single year, it likely wouldn't have dethroned its long-term dominance.
Possible Contenders:
* Other Classic Games: Games like Clue, Scrabble, Candy Land, and Chutes and Ladders were all popular and could have had strong sales years in 1967.
* New Releases: There might have been a new game that captured the public's imagination and had a particularly successful year, but without sales figures, we can't know for sure.
So, it's impossible to say definitively which game outsold Monopoly in 1967.