What is this?:
This would be the ability to see your nation's total net worth of each resource of what you have produced, used and wasted. This would be all of your nation's build from the past and different city counts.
Why should Alex implement this?:
This would be a fun stat to show off to people on how much you've produced all of your nation's age.
Where would you be able to see this?:
Two ideas are either add another tab under nation named "Total Net Worth" or either a link at the top of Revenue page under "Revenue Log" named Total Net Worth. (It would also be nice to see other people's total net worth as well)