Hii there, As for starter, its been said that caste system is a very bad system but in truth i guess, its one of the best.
I will Quote only Manu, he says in representation to the GOD but I am changing it to the Society
1 Brahmin are like the brain of the society and hence been regarded as top most (Scientist, teachers, architects, doctors come in thsi category)
2 Kshtariya, they are protectors and administrators, they are called as the chest or the heart of the society (Army, Policemen and Admisnistrators come in this category)
3 Vaishya, Entrepreneurs come in this category, they are called as the belly of society as they arrange all resources
4 Sudra, Labour, they are called as the feet of Society, because only on their feet society moves.
Now only if you remove Dynastic system from it, you will find its one of the best system of Administration, But I guess its outdated for todays world but at that time, its very advanced thought out.