From GameWatcher: “Paradox has announced that popular grand strategy game Europa Universalis 4 is getting a new expansion called Leviathan. This time around, it’s the smaller nations that will receive some much needed attention, in the shape of new diplomatic and economic tools that encourage playing tall.
This essentially means that players will get more options in terms of establishing “smaller and more focused realms with a few centers of power.””
Source: N4G PC Europa Universalis 4's Leviathan Expansion Adds New Tools to Encourage Playing As Smaller Nations