The Iran Deal Hasn't Changed Anything (Tom Tugendhat, The National Interest)

Since the P5+1 (the five permanent members of the U.N. Security Council, along with Germany) signed the nuclear deal with Iran in July 2015, remarkably little has changed. Instead of using the opportunity to bring itself back into the international community, Iran has continued to sow instability across the region. Syrian forces are still backed by Iran, and Iraqi militias still get their orders from Tehran. From the Gulf to the Red Sea, Tehran is using Shia groups in its quest for supremacy up to the borders of the old Persian Empire. None of this should be surprising—Iranian policy has barely changed in two thousand years

http://nationalinterest.org/feature/the-iran-deal-hasnt-changed-anything-16390