"What's the minimum a modern citizen should know about ..." No much In fact, I would say the list of "today" is pretty similar to the list of a decade ago, a

"What's the minimum a modern citizen should know about ..." No much In fact, I would say the list of "today" is pretty similar to the list of a decade ago, a quarter century ago, half a century ago, and a century ago Most people do not need to know much if anything about most things Basic financial literacy Where food comes from How to make a handful of meals more-or-less 'from scratch' (or...at least without too many pre-kitted items) The roles of the branches and levels of government in your country How to spot statistically-likely (and -unlikely) data both online and in print And the basics of keeping your devices up-to-date Anything else you can look up if/when you have the interest