Is social commentary effective through literature

I think it is. Social commentary incites the use of symbolism and plot to determine an end result that can be connected to something happening in society or past events. Not only this but literature pieces such as Animal Farm use symbolism to explain/describe events in history. Even Dr. Suess provided social commentary in his children' books. The message conveyed through these writers can be perceived on multiple levels, which I find fascinating as I have an entirely new perspective on Dr. Suess now vs as a child.