Source A: Excerpt from a historical overview

'Teddy Roosevelt emerged as a leading figure in the Progressive Era, advocating for reforms to address the problems caused by rapid industrialization and urbanization. His policies aimed to protect consumers, regulate big businesses, and promote conservation of natural resources.'

Provenance: A textbook chapter on American history, published in 2010.

Source B: Summary of Roosevelt's reforms

'Roosevelt’s major policies included the Square Deal, which aimed at fair treatment for workers, consumers, and businesses. He also established national parks and supported conservation efforts to preserve American natural resources.'

Provenance: Educational resource on Roosevelt's presidency.

Source C: Historian's view

'Roosevelt's presidency marked a significant shift in American politics, emphasizing active government intervention to address social and economic issues. His reforms laid the groundwork for future progressive policies.'

Provenance: A historian’s analysis published in a history journal.