IGOs succeed or fail based on member state actions
Realists believe that IGOs only exist because the state created them and that the state has ultimate power to decide to join or leaveIGOs. Seen with the UK using Article 50 to leave the EU
Realists believe that states often act outside IGOs, making agreements with each other outside of IGOs
Realists believe that free trade only exists because states agreed to it
Realists believe that states have the power to abolish or reduce laws
Realists believe that states still have the power to act unilaterally, regardless of IGOs or treaties