US and Canada
After WWII, and before the invasion of Pearl Harbor the US committed to remain neutral toward conflicts in Europe because they want to be a peaceful nation. In addition, the American people have voiced there opinion asking the US to remain neutral on conflicts in Europe.
Russia and the US .
Europe & Sweden
Russia and the US .
growing conflicts in European and Asian countries.
Nobody. The US does not participate in it. It is for countries that are affiliated to UEFA, which are countries in Europe.
All countries in Europe
In the US, Canada, Europe, and Australia, no. Polygamy is illegal in all 'western' countries. It is legal in some African, Middle Eastern, and Asian countries.
Practically every country in Western Europe (UK, Ireland, Germany, France, etc.). These countries share the Western culture.
Europe is 10,180,000 km2 while the US is 9,826,675 km2; Europe is larger.
Vietnam, USSR, Kuwait, Somalia, Afghanistan, and Iraq.