Local police & civilian groups
Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.
So basically there shall be no slavery within the US, and if there is it will be prosecuted.
A/ the belief that nations could prevent future conflicts through self- determination is your answer.
Note:
nations could prevent future conflicts: "...and particularly that it be <em>made safe for every peace-loving nation</em>... wishes to live its own life, determine its own institutions, be <em>assured of justice and fair dealing</em> by the other peoples of the world as <em>against force and selfish aggression</em>." (emphasizes added)
hope this helps
<span>New immigrants shape the architecture of US cities by bringing their own style of architecture that may be distinct to their own culture. For example, during the European colonization of the US, the American architecture was heavily influenced by European architecture such as English revival architecture.</span>
