Final answer:
Theodore Roosevelt's 1908 speech highlighted his dedication to conservation policies and economic progressivism, including establishing protected lands and advocating for stronger federal government regulations on corporations as part of his New Nationalism doctrine.
Step-by-step explanation:
Theodore Roosevelt's speech to the Conference of Governors in 1908 emphasized his commitment to conservation policies and economic progressivism. He is particularly noted for his substantial contributions to conserving public lands, establishing many national forests, wildlife refuges, and national parks. His conservational efforts not only preserved the environment but also paved the way for future preservation under the National Park Service, which was created during Wilson's administration.
Roosevelt's progressivism extended beyond conservation to include the confrontation with big business and regulated economic activities. The New Nationalism doctrine represented this progressivism and advocated for increased federal power to regulate corporations and protect consumers and workers. This bold approach to leadership and policy shaped the presidency and laid groundwork for his successors. These elements reflected the values of the Progressive movement, focusing on democracy, efficiency, social justice, and the management of natural resources.