Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - General Penalties overhaul

I think its pretty obvious that this is a class based game, take a look at the skill names in the spread sheets.

Ranger Lore, Warrior Lore, Air Specialist..its not a rigid class system, but it is a class sytem its just that your class is determined by your skills. It's a lot like the Job system of Final Fantasy Tactics imo.