Complex sentence: The magazine is best known for showcasing work that defines its historical moment; special issues have focused on political oppression, religion, the natural world, crime, aging, civil rights, love, ethnic America, and, most recently, exile.
Split into simpler sentences: The magazine is best known for showcasing work that defines its historical moment. Special issues have focused on political oppression, religion, the natural world, crime, aging, civil rights, love, ethnic America, and, most recently, exile.