ELI5 Ice Cream - why is vanilla the default flavor?

Why is vanilla the neutral flavor? Who invented ice cream? Why does ice cream in root beer foam so much (and taste so good)? Which country in the world consumes the most ice cream per capita?   ... We explain like i'm five!   Thank you to the r/explainlikeimfive community as always and in particular the following users whose questions and comments formed the basis of this discussion: coolrulez555, arokthis, melia2005, zk686, masterofevilaku, triasatops1, dholmes85, tjorvensnorren, freetattoo, themundratales, bulksalty & audiotecnicality To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Send us an e-mail: [email protected]