Complex sentence: Njegoš has remained influential in Montenegro and neighbouring countries, and his works have influenced a number of disparate groups, including Serbian, Montenegrin and South Slav nationalists, as well as monarchists and communists.
Split into simpler sentences: Njegoš has remained influential in Montenegro and neighbouring countries. His works have influenced a variety of disparate groups, including Serbian, Montenegrin and South Slav nationalists, as well as monarchists and communists.