curious on how we managed to have universal number system
Hi, you may be interested in a couple of posts on the spread of Hindu-Arabic numerals
What caused Arabic Numerals to be accepted world wide, but alphabets developed such a wide variety? - featuring /u/jooseman
When and how did Asian countries switch to the use of Arabic numerals? - /u/t-o-k-u-m-e-i with more detail for Japan