Slavery in pre-Spanish Philippines was practiced by the tribal Austronesian peoples who inhabited the culturally diverse islands. The neighbouring Muslim states conducted slave raids from the 1600s into the 1800s in coastal areas of the Gulf of Thailand and the Philippine islands. Slaves in Toraja society in Indonesia were family property. People would become slaves when they incurred a debt. Slaves could also be taken during wars, and slave trading was common. Torajan slaves were sold and shipped out to Java and Siam. Slaves could buy their freedom, but their children still inherited slave status. Slavery was abolished in 1863 in all Dutch colonies.