Miyagawa extends his theory of Strong Uniformity, introduced in his earlier book, Why Agree? Why Move? (MIT Press). He argues that agreement and agreementless languages are unified under an expanded view of grammatical features including both phi-features and discourse configurational features of topic and focus. He looks at various combinations of these two grammatical features across a number of languages and phenomena, including allocutive agreement, root phenomena, topicalization, "why" questions, and case alternation.