Well this certainly lives up to the discussion thread title.
Sorry, this is not the ignorant replies thread.
What about the wheel (Mesopotamians)
the wheel was invented on the Eurasian steppe.
What about geometry?
Indo-Europeans (including Greeks) evolved on the Eurasian steppe and then spread out.
Or perhaps something fairly important called numbers.
See above point.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.