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C. Allowing newly added territories to the United States decide for themselves the slavery issue.</span>
Popular sovereignty was proposed as a way to decide the issue of slavery in the new territories. Under such a system, the local population would decide the slavery issue rather than Congress.
His ideas helped in many ways but most importantly his belief in Religious and freedom from government sponsored religion influenced the 1st Amendment to the Constitution. The 1st Amendment (Bill of Rights) protects citizens from having their government dictate religious practices.
