John Donne's "No Man is an Island" is about the connection between all of humankind. Donne essentially argues that people need each other and are better together than they are in isolation, because every individual is one piece of the greater whole that is humanity itself. The paragraph isn't actually a poem but a famous excerpt from Donne's Devotions Upon Emergent Occasions. Written in 1623 when Donne was in the grips of a serious illness, the Devotions examine what it means to be a human being and the relationship between humanity and God. Each of this book's 23 sections features a "Meditation," "Expostulation," and "Prayer." This particular segment comes from the 17th "Meditation."