I know the Civil War was fought over State’ Rights.

You might like to see the FAQ section "The Civil War and Slavery", especially the excellent "Was the American Civil War about more than just slavery?" by /u/Georgy_K_Zhukov. It starts with a TL;DR summary, and then provides copious contemporary source documents, and arguments based on them and acts of the period.

This is not to discourage discussion. More questions, data and debate are welcome.