The economy of this game is the only game I've found -- and I've looked -- that really feels like it might have been how things operated 'back in the day'. Having to build out your shipping infrastructure to get the supplies back to your factory, the infrastructure of which itself has to be built out, in order to build out greater resources to trade that dove tails into needing to build out more trading capacity -- all while keeping your frienemies close enough to you that they don't destroy you on a dime. It's wonderful.