Pan-Iranism
Pan-Iranism (Persian: پانایرانیسم) is a nationalist ideology that espouses the necessity of socio-cultural intimacy between all Iranian peoples.
According to the Routledge Handbook of Persian Gulf Politics:
"One important point distinguishing the radical nationalism of pan-Iranism from pan-Arab or pan-Turk orientations in the region is the fact that the Iranian version currently does not seem to include irredentist plans in its political program. Rather than demanding the return the lands separated from Iran in the past, such as Afghanistan, Tajikistan, Pakistan, the Republic of Azerbaijan, Bahrain, or the Kurdistan region, the Pan-Iranist Party emphasizes the cultural integration of the Iranian civilizational basin."
However, there are some streams of this form of pan-nationalism that promote irredentist views and ambitions, namely by demanding the territorial unification of all Iranian-inhabited lands in West Asia, the Caucasus, Central Asia, and South Asia. More specifically, radical pan-Iranists typically take the view that the historic boundaries of Iran, such as those of the ancient Achaemenid Empire, must be revived to the extent where Iranian peoples are brought closer together under one state.