The first is the overlapping web of wars and crisis. This has forced millions of people from their homes in the middle East, Sub-Saharan Africa and elsewhere.
2. The second part and less discussed, is the increasingly anti-refugee politics in the Western and other wealthy countries that are the ones best suited to take in refugees.
People within these countries are insecure and fearful over the effects immigration has. They are preoccupied with the very vague but long-held ideas about national identity, populist politics and thus policies that may contribute to the crisis.