There are two mods by now: the small mod that replace clergy with intelligentsia and alfa mod that ADD intelligentsia in game (more information below).
Intelligentsia is a social class of people engaged in complex, mental and creative labor directed to the development and dissemination of culture, encompassing intellectuals and social groups close to them (artists, writers, scientists, school teachers, clergymen, etc.).
About mods (Read this first!):
The first one is actually for players who want intelligentsia in their game and don't care about clergy. I haven't change balance, so I recommend you to use it with some balance mod such as Pop and Economy overhaul mod or you can simply use one of the mods that has already included my mod:
The Victoria 2 Realism & Rebalance Project (only one by now)
The second one is for modders mostly, because:
There is no intelligentsia pops, because unfortunately i'm not a historian and don't know how many intellectuals live in London or Paris by 1 january 1836
I havent touch any pop files, because any single mod has its own promotion and consumption system
There is still a problem of education and con reduction
To install simply place folders into your game directory. It's strongly recomended to back up original files. The mod replace localization files, so it can delete some other mod descriptoins. In this mod consciousness reduction by clergymen disabled. If you want this feature, do not extract 'common' folder.