Conversation so far:
What were William H. Seward's views on diplomacy?
When the war started, William H. Seward turned his attention to making sure that foreign powers did not interfere in the conflict.
How did William H. Seward make sure foreign powers didn't interfere in the Civil War?
When the Confederacy announced that it would authorize privateers, William H. Seward sent word to American representatives that the U.S. would become party to the Paris Declaration Respecting Maritime Law.

Question: What else did he do in politics?
Self-contained rewrite: What else did William H. Seward do in politics besides making sure foreign powers didn't interfere in the Civil War?