International law has always struggled with the crime of aggression. Theoretically, it stands as the gravest breach of international peace - the "supreme international crime" from which all others flow. In practice, however, it remains one of the most difficult offences to prosecute, hampered by narrow definitions, complex jurisdictional barriers, and explosive political sensitivities. Yet something is shifting. Across legislative chambers, university seminars, and advocacy networks, pressure is mounting to stretch the boundaries of aggression far beyond what its architects envisioned.