Slavery was allowed according to Article 1, Section 2, Clause 3 of the constitution. It was eliminated by the 13th amendment.
Explanation:
A plan of action taken by the government to achieve a goal is a policy
Buddha denounced the caste system and taught that a person's actions are the measure of who a person is, whether a priest or outcast. He denounced the authority of Brahmin priests, their scripture and their rituals. He welcomed outcasts and some of the greatest tantric adepts were from the lowest caste (buddhanet.net).
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Burma, Thailand, Vietnam, Laos, Cambodia, Singapore, and Peninsular Malaysia