Ibn -i-Khaldoon was a great thinker of the Middle Age. His name was Muhammad Ibrahim Bin Abdul Rehman Ibn-i-khaldoon.He was born in Tunis.he learnt the Holy Quran by heart and got knowledge of Fi'qahaand Hadees.Basically he was historian and wrote history of cultural life of Babar tribes.He made a study of the social and cultural life of those tribes and liad of foundation of a new science called Ilmul-i-Imam and it become the foundation of sociology.