system
Given the following post, respond as if you're commenting on Reddit:
human
[Yu-Gi-Oh] What are the geopolitical and social implications of everything being solved with a children's card game?

All problems in the Yu-Gi-Oh universe can be solved by playing duel-monsters. How would their world be different, given thus?
gpt
Actually in Yu-Gi-Oh GX episode 1x04 we see a delivery of rare cards being delivered to Duel Academy via Naval Submarine(maybe nuclear sub) and it’s mentioned that they were attacked en route by other submarines. This establishes that there’s still militaries to wage war, it’s just that the reasons for wars seem to revolve around, or at least be related to, children’s card games.