An irredentist Greater Germany, even if it is limited to contiguous German-speaking regions, would have about 100 million inhabitants. Pan-nationalism is not the same as diaspora nationalism, such as Zionism, which implies the concentration of a dispersed group on an ancestral homeland. Colonies (other than settler colonies) fall outside most definitions of a nation, since both coloniser and colonised recognise that they share no ethnicity, culture, and language.