The 2004 tsunami killed 170,000 Indonesians, hitting the province of Aceh hardest. Aceh's recovery is seen as a success story. But international aid to the area went from $6.7 billion to nearly nothing in four years, and today Aceh remains one of the poorest parts of the country.
Ahead of a major summit in Addis Ababa next year, a new ODI paper looks at how post-2015 development should be framed and funded.
For reducing poverty, migration is a far more powerful tool than aid. Yet it remains a costly, dangerous venture.