> 
> I had no idea majority became clerics over land owners? That's interesting.
> 
> The RP starts on 1st of January 1400AD. I think one RL day will be 2-3 RP months. Most likely two so every six days I will post a kingdom report (active members of the noble houses, who owns what, population of their fiefs, money they have, costs and incomes, possibly some sort of power index based on all of that plus the army size and social ranks of family members)

Indeed. It was a direct consequence of the germanic-barbarians' succession custom, which stated that the property of the father had to be equally divided to each son. Following this same usance in fact, The Holy Roman Empire shed into three different countries: The Germanic Empire, Northern Italy, and France.
Thus, to avoid problems with succession which was ruled by similar laws, centuries later, most nobles preferred to send their youngest children in monasteries, where they were likely to achieve an important rank nonetheless.