democracy
UK’s political system
Constitution Authoritarian
Russia’s political system
CCP and/or Authoritarian
China’s political system
Theocracy and/or Authoritarian
Iran’s political system
Constitutional Democracy
Mexico’s political system
Constitutional Democracy
Nigeria’s political systems
democratic
UK’s regime
authoritarian
Russia’s regime
authoritarian
China’s regime
authoritarian
Iran’s regime
emerging democracy
Mexico’s regime
emerging democracy
Nigeria’s regime
Unitary, but turning more federal
UK’s government
Federal but asymmetric
Russia’s government
unitary
China’s government
unitary
Iran’s government
federal
Mexico’s government
federal
Nigeria’s government
Scottish, Irish
UK nations
Han Chinese, Tibetans
China’s nations
Illiberal or hybrid regime
Russia’s regime
one-party system
China’s regime
Illiberal or hybrid regime
Iran’s regime
hybrid
Mexico’s regime
military and more recently hybrid
Nigeria’s regime