It's called curiosity at its best.
Is this even possible: America throughout the 18th and 19th centuries conquered much of the bulk of the western hemisphere right after the birth of America from the 15 patriotic colonies. America allowed the accumulation of Catholics to reside and learned to tolerate them when Quebec first joined the American revolution and slowly carved out acceptance of other religions during the Latin campaigns. Immigration policies allowed many people from China, Japan, Europe, and Russia to immigrate to America providing America a new and fast growing workforce its manufacturing factories producing goods, weapons, and medical paraphernalia for future wars back at the Eastern Hemisphere. World War 1 erupted with a large amount of causalities and damage while America stayed neutral proposed by Wilson's isolationists policies. World War 1 went throughout the 1920s; damaging the UK's, Russia's, Germany's, and other European economies and infrastructure. The Allies won but at a cost so great it even went through and worsened throughout the Depression days after the crash of 1929. Europe's economy is in shambles thanks to the long and aggravating war. The US, seeing the damage done by the war it never went through, became more isolationists and self-reliant while still allowing European and Asian refugees entering the massive United States for sanctuary. World War 2 destroyed much of Europe and Asia even more. Japan, instead of attacking Pearl Harbor, attacked Vladivostok and much of USSR Far East so the US remained neutral but still provided weapons, medical supplies, trade goods, and services for both the Allies and Axis, boosting the US economy from the depression. Immigration was expanded for refugees fleeing from war-torn Afro-Eurasia. World War Two ends with Nazi Germany and Japan as victorious but so much of Europe's and Asia's industries damaged from the multiple wars greatly reduced the victors. The US became even more isolationists, creating a neutral pact with both Germany and Japan but aids the failed Allied nations through small reconstruction programs. The US, oblivious to German's visions, sees Germany as an expansionists while seeing Japan wanting control over the Asian Pacific. Japan's and Germany's super oppression of the public and the media became too much and revolts and riots sparked throughout the late 20th century, worsening the economies of the two Axis nations. Industry and manufacturing move to America and America became more like China OTL, producing massive amounts of goods with its massive population of over one billion people. Germany and Japan went to war over the remnants of the rump USSR starting World War 3, even worsening their economies. The US remains the only industrialized hyper-power of the world by the 21st century as its industry continues to expands exponentially providing the most of the world's goods. Immigration to America continues and by 2050 or so, America's population reach two billion people.
Neutral League:
-United States of the Americas
-Republic of the Philippines
-Republic of Ireland (has northern Ireland from the UK)
-Portugal
-Switzerland
-Spain
-Sweden
-Free West African Republic
-Republic of Ethiopia
-Republic of Oceania
-Federation of Congo
-Federal Republic of India
-(Others I have not mentioned)
Allies of the Third World:
-Rump of the United Kingdom
-Free East Australian Republic
-Free New Zealand
-Free South African Republic
-Ural People's Republic (Rump USSR)
-Republic of Southern China
-Norway
-(Other nations I did not mention)
Axis of the Second World:
-Fourth Reich of Germany
-Occupied France
-Italy
-Occupied West Australia
-Occupied Indonesia
-Occupied Netherlands/Belgium/Luxembourg
-Japanese Empire
-Occupied Indochina
-Occupied Korea
-Occupied Formosa
-Occupied Northern China/Manchuria
-Occupied Russia Far East
-Occupied Muscovy
-(Other nations/occupied lands I have not mentioned)