Answer - Transcendentalism
The philosophy that is most closely
associated with Thoreau is Transcendentalism. A central belief of transcendentalism is in the innate goodness of people
and nature. His philosophical movement arose as a reaction the general state of
intellectualism and spirituality in eastern U.S in the late 1820s and 1830s.
combined vertical and horizontal integration
Mount Everest is the highest mountain peak
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In exchange, the United States pledged to avoid involvement in the political affairs of Europe, such as the ongoing Greek struggle for independence from the Ottoman Empire, and not to interfere in the existing European colonies already in the Americas.
The answer is European colonies that are already existing in the Americans.