I'm very new to the studies of Islam so I apologize if my question is very basic.
It is my understanding that madhab is a term to describe a school of thought AND that in general, there are four schools of thoughts: Sunni, Shia, Ibadi, and Amman Message.
Is there a chart/venn diagram that compares/contrasts these four schools of thoughts?
What is the importance of all these differences and similarities?
Thanks for your help on my pursuit to understand more about Islam.