Answer:
diasporic
Explanation:
Diaspora is a noun originating from the Greek term "diasporá", which means dispersal of peoples for political, environmental or religious reasons. This word serves to describe any ethnic or religious community that lives scattered or outside its place of origin.
For this reason, a book detailing the migration and resettlement of the Irish around the world as a result of the potato famine in the late 19th century is part of diasporic histories.