The Atlantic slave trade of the 16th-19th centuries, where entire populations were uprooted and traded as commodities, is now recognised internationally as a crime against humanity.
Mae'r ardal o amgylch Blaenafon yn un o'r enghreifftiau gorau yn y byd o dirwedd a grëwyd gan waith glo a haearn ar ddiwedd y 18fed ganrif a dechrau'r 19eg ganrif.