There are 5 military ideas (aristocratic, divine, horde, indigenous, plutocratic) that, in order to be selected, require the player to have the respective government type. Either a monarchy, a theocracy, a horde, etc. Let's suppose I choose one of them, like divine or horde ideas. And then I get a different government reform. Because, for example, I was a Manchu horde that became the Celestial Empire; or I was a theocracy that became a republic. What happens then? Do I lose the entire idea set, including the ideas I have already invested in? Or it remains as taken, with the ideas active, only that some of them may not work (like the ones providing horde unity or devotion)? Could you guys, fellow EU4 players, enlighten me as to what really happens in this situation because it's driving me crazy! Thank you.