Political power bloc

A political power bloc was an alliance, or group, also called a sphere, that consisted of multiple nations with mostly alligned interests.

21st century
The West (~NATO)

Russia, China and India (later broke up)

transitioned to

North Atlantic Confederacy (most ex-NATO members)

Spanish Union (most Spanish-speaking countries) and Brazil

East Asian Federation (China and Indochina)

African Association (most African countries, except Marocco and Ethiopia)

Middle East League (most Middle Eastern countries, except Iran) and Indonesian League (Indonesia and the Phillipines) transitioned into the Indarab Association

India

22nd century
North Atlantic Confederacy and Spanish-Brazilian Alliance (Spanish Union and Brazil), the West 

East Asian Federation and North Eurasian Republic/Siberian Republic (Russia and a part of Central Asia, later split, one merging with the NAC, the other forming the Siberian Republic), the Northeast

African Association and Indarab Association, the South

India