The federalists favored a stronger central government in writing the American Constitution to overcome the weaknesses of the Articles of Confederation. Whereas, the Anti-Federalists wanted a weak central government similar to what existed under the Articles of Confederation.
New immigrants from Asia and Latin America have added a large measure of cultural and phenotypic diversity to the American population in recent decades, just as waves of immigrants from Southern and Eastern
Taking into account the statement above "Which was a feature of the relationship between the soviet union and the united states in the era leading up to détente?"