even if you built one per planet 15*0.1 (as earns 1 point every 10 turns) + 0.5?? (don't know where you're getting the 0.5) + 1? (don't know where you're getting this from either) = maybe 3 per turn but, I don't know where you are getting the extra .5 and 1 from.

A while back were were supposed to get ideology from invasions, instead they made it a trait. I think we should have more options on how to get ideology. Since we interact with the map ONLY for colonizing or invading we need to derive them from those sources. I daresay trade would be good but we only really have a handful of trade routes per game, although those would also be a good source.

In addition to those, Espionage can and will open up possibilities to get ideology points.

Personally what I would like to see are more moral or thought provoking choices where the options presented are all good or all come with consequences if you chose another. 

As an example: 

We are given a choice upon Colonizing of several events that we can have happen. Most do not come with a malus and playing with a malus is bad design. Instead lets play with "Sure you can make slaves of the population now for +10 raw production or if you integrate them your chances of unlocking a secret tech tree go up by 20%". Notice that both are good choices and one is an unknown. 

What secret tech tree you say? Why the one that is there to all players if they can unlock it! There are actually 3 trees that are secret (weapons & defenses, Diplomacy and trade, and finally population and production), This also forces us as players to make choices that can and will 'drag out the game' well into and past the Ascension era..

Sorry Seilore, I had a thought and ran with it. 

colony-unique buildings give +0.1 points per turn, the faction building (one-per player) gives +0.2 buildings per turn.  Don't know what you mean by player achievements...  didn't know ideology only path auto gives +1 per turn.

No mods and I'm going right off the building description in game.

Always love more ideas.

Then the descriptions in the ideology screen where one unlocks the building is incorrect.  Unlocking all three buildings in Merciless with unlocking 6, Benevolent takes 5 choices to unlock all three, Merciless takes 7, Pragmatic takes 4.  

Lets say you can unlock all 3 options and you only choose one ideology that get's you 23 points every 10 turns based on 4 planets can support buildings (maybe more as the game progresses).  This still means to unlock a 7th it would take about 30+ turns and an 8th almost 40 turns beyond that.  (now that is far less than my original projection using information off the ideology screen but, unlike some players I rarely choose one ideology path normally I'm split between Pragmatic and Benevolent which means at most I've unlocked all 3 on benevolent in this theory and 1 pragmatic.  This still shows the problem.  Because in reality we know this doesn't always happen this way.

Ideology costs could go in the setup screen for each game.

Default would be normal.

Custom factions are allowed in Multiplayer, however, why are you handicapping all other factions in MP?

Largest possible I believe is Huge/Gigantic Usually play with abundant planets/stars/habitable.  Although I thank you for that suggestion, however, I should be able to take my normal faction I play with in SP games and play with them in MP with similar experiences, I shouldn't have to have one faction for MP to be able to use Ideology and one faction for SP.