Back in Alpha Centauri, when another leader wanted you to adopt their favourite social engineering model, they would have a specialised diplomacy bit that was based on their favourite and your current relevant model. Deidre would complain about polution if you had Free Market, and Miriam might declare your Democracy as godless. But in Civ4, there's just a generic "Adopt our civic, please" message. How would one go about making specialised diplomacy for favorite civics?