Final answer:
The US shifted from isolationism to imperialism in the late 19th century, expanding its power through acquiring new territories, military might, and economic strength, ultimately building a worldwide influence that is marked by both military presence and cultural impact.
Step-by-step explanation:
The Creation of an American Empire::
The late 19th century marked a shift in US foreign policy from the isolationism recommended by George Washington to a more aggressive imperialism. The United States observed European powers expanding their empires and felt compelled to follow suit in order to protect its security and economic interests. This led to the country acquiring new territories and asserting its influence on the world stage, a pattern which continued into the 20th century.
Expansion of US Power::
A combination of military might, economic prowess from the Industrial Revolution, and the assertion of presidential war powers were key methods used by the United States to expand their power around the world. The Spanish-American War and the 'Open Door' policy with China were among the key steps towards building an empire. American leaders like Theodore Roosevelt played significant roles in advocating for an increased global presence.
Constructing Global Influence::
By the early 1900s, the United States not only had significant control over new territories in the Caribbean and Pacific but also held economic power through international trade. An example of this influence was the cultural reach of American brands, which incited both admiration and disdain globally. Military bases around the world, as seen in a 2007 world map, continue to represent the scope of American power.