Since our founding we’ve worked at the heart of some of the world’s toughest problems. We’ve mitigated conflict in Afghanistan, Somalia and South Sudan. We’ve secured a fairer deal for poor countries in global climate change negotiations. We’ve forged cross-sector collaboration that is improving incomes for millions of African smallholders. And, as anyone working on these issues will know, at times we’ve been humbled, frustrated, and plain scared. We’ve also been inspired and amazed. We’ve worked alongside remarkable people leading change as civil servants, business leaders, academics, pioneers and activists. And we’ve learned a great deal about how change happens. We salute you.