In February 2003, in Dublin, I marched against the impending Iraq War alongside 100,000 other people. Similar protests took place around the world that day, including around a million people marching in London. Today, 13 years, and 250,000 violent deaths later, with millions of people displaced, we now have official recognition of what those of us who marched knew all along, that we were right. As Sir John Chilcot put it in his report published yesterday, "we have concluded that the UK chose to join the invasion of Iraq before the peaceful options for disarmament had been exhausted. Military action at that time was not a last resort”. I listened to Tony Blair's press conference afterwards, full of proclamations that lessons have been learnt, but for me, in all today's coverage, one fundamental lesson went unaddressed.