Query: What have the peoples in the Americas been more vocal about since the 20th century?
Context: However, since the 20th century, indigenous peoples in the Americas have been more vocal about the ways they wish to be referred to, pressing for the elimination of terms widely considered to be obsolete, inaccurate, or racist. During the latter half of the 20th century and the rise of the Indian rights movement, the United States government responded by proposing the use of the term "Native American," to recognize the primacy of indigenous peoples' tenure in the nation, but this term was not fully accepted.