We need change that builds, rather than destroys. That means controlling arms supplies as the Arms Trade Treaty already requires governments to do. It means offering a refuge to those fleeing violence and persecution, as the Refugee Convention has for decades prescribed. We must also develop a Global Compact on Migration, to protect migrants, so often as vulnerable as refugees, and to manage migration for the benefit of all. If the terrible events of 2016 are not to be repeated, the calls for change to make the world more secure and inclusive must be heard and acted on. Nadi's experience may seem a million miles away from ours but we share the same thread of laws and norms that are supposed to keep us safe. Ultimately we are all in this together.
As I write this, I have just been given the devastating news that Yasser Lakmoush, a SARC volunteer from Idlib, has tragically been killed while undertaking humanitarian work. Poignantly, before his death, he tried to illustrate the emotions of being a frontline first aider in this crisis: "the feeling you have when you save somebody cannot be described, it is a matter of life or death."
Humanitarian aid is usually most needed in some of the most difficult places on the planet. These are places that lack what we take for granted such as water, food and safety but instead have plenty of conflict, food insecurity and disease. If you are a child in a place like that life is difficult, often far too short and full of terrible choices.
Over recent weeks and months we've seen attacks on civilian targets such as hospitals and aid convoys in Syria and Yemen. We appeal to all parties to respect the basic principles of international humanitarian law - precaution, protection and distinction of civilians. Everything must be done to allow the safe and unimpeded access to any humanitarian organisation working to protect and assist the people fleeing Mosul.
With this knowledge, and with courage and honesty, we must build on the rhetoric of the New York meeting to identify practical solutions. In today's globalised world, where instability in one place can affect stability in another, we must find ways for all individuals to access opportunity, so they can contribute and achieve irrespective of where they were born.
Volunteers are not collateral damage. They are not acceptable targets when a ceasefire ends. Ceasefire or no, the rules of international humanitarian law still apply. Safe access must mean safe access. Guarantees given by fighting parties must be honoured. This recent attack has horrified people across the world. It has also denied 78,000 people of much-needed aid. These attacks cannot and must not continue. We call for all aid workers to be respected and protected. This, sadly, may not be the first time aid workers have been attacked. But it should be - it must be - the last.
Just over a year ago you will have seen a photograph of the lifeless body of Alan Kurdi on an Aegean beach. It was said that the photograph "shook the world", but more than 3,000 more people have died, or are missing, in the Mediterranean this year alone. We, and our politicians, might disagree about many things but we should all agree that the senseless death of children - on any scale - is not something that we can ignore.
In wars and disaster zones, a simple explanation is that humanity is a force that advances the idea of life, with dignity. To strengthen the idea of humanity for people caught in conflicts, epidemics and disasters, we could borrow some ideas from the Olympic motto: Citius (faster), Altius (higher) and Fortius (stronger).