Have been at the forefront of every important social change in the united states from the beginning of the nation.

Nonprofit organizations is the element that completes the phrase.

Have been at the forefront of every important social change in the united states from the beginning of the nation.

Explanation:

Nonprofit organizations are public-oriented groups that look to satisfy a certain population need in particular. Right now, there are around 1.5 Million non-profit organizations in the United States, including foundations, charitable organizations, chambers of comers, civil leagues, etc. The first knowledgeable nonprofit organization was The Peabody education fund which was founded in 1867, it's objective was to help poor white persons and ex-slaves to reach education to develop.

latin america is a region of racial and cultural diversity.  it is a group of countries and dependencies in the americas where romance languages are predominant. the term originated in 19th century france as amérique latine to consider french-speaking territories in the americas along with the larger group of countries where spanish and portuguese languages prevailed.

explanation:

answer; i believe the correct answer is (the willamete valley);