Three years ago, the world watched in shock as Syria slowly descended into bitter conflict. Once thriving communities have been utterly destroyed. Nine million people are now in need of humanitarian assistance, with their future looking perilous and uncertain. The scale of the humanitarian crisis which results from a conflict of this kind can be overwhelming. But we cannot let ourselves forget its human face.
The crisis engulfing Crimea is a grave one. Vladimir Putin's armies have cut the region off from the rest of the nation, and are insisting on an illegal referendum in order to give elusive legitimacy to a brazen act of aggression. Now is not the time for the West to take options off the table - even rather unpalatable ones.
As the war in Syria enters its fourth year, it's easy to lose hope. Even if there is a peace deal in the next few months - which, after the disappointments of the Geneva peace talks, seems as unlikely as ever - how will people recover, rebuild, and achieve any sort of reconciliation? How can Syria be a functioning country again?
Three years ago, a group of school-children scrawled political graffiti on a wall in the remote Syrian town of Daraa. Their subsequent arrest and torture was the spark that ignited the civil war now ravaging Syria and devastating the lives of so many of its 22 million people. This civil war is now thought to have spawned the world's worst humanitarian crisis.
Imagine the horrors of healthcare in a warzone: children having limbs amputated because of a lack of medical supplies and equipment to treat their wounds. Patients knocked out with iron bars, rather than face an operation without anaesthetic. A newborn baby dying in an incubator because of power-cuts... For millions of people inside Syria - this is the reality of their lives now.
When I visited a refugee registration centre in Lebanon recently, I heard stories of young children who have been through shocking experiences. Syrian boys and girls have fled conflict, lost their homes and watched friends and family members being killed. And now these children are facing another threat - the often hidden horror of sexual violence.