Final answer:
U.S. citizens continue to face marginalization socially through discrimination, politically via voter suppression, and economically due to systemic inequalities. Despite legal advancements post-Civil Rights Act, discrimination persists in a market economy that does not fully address these racial inequities.
Step-by-step explanation:
In examining the ways in which U.S. citizens continue to be silenced and marginalized politically, economically, and socially, one must consider various factors. Socially, racial and ethnic minorities often encounter systemic barriers, such as discrimination and unequal access to education, that can limit their opportunities. Politically, tactics such as gerrymandering and voter suppression bills disproportionately affect marginalized communities, undermining their political representation and voice. Economically, systemic inequalities persist, as reflected in the ongoing wealth disparity between white, middle-class Americans and those living in the "other America," with minority groups often facing obstacles to economic advancement.
Historically, despite the abolition of slavery following the ratification of the 13th Amendment and the passage of the Civil Rights Act of 1964, African Americans and other minority groups have struggled against discriminatory practices in a market economy that has been slow to correct racial inequities. While markets do provide some level of freedom and can enable minority groups to establish economic niches, history shows that market forces alone are not enough to eliminate discrimination or bridge the gaps created by centuries of systemic disadvantage.