Back to Basics is a tribute to 1920s-1940s rock and soul artists.
 To be called "tribute" a recognition by the payer of political submission to the payee is normally required; the large sums, essentially protection money, paid by the later Roman and Byzantine Empires to barbarian peoples to prevent them attacking imperial territory, would not usually be termed "tribute" as the Empire accepted no inferior political position
== The Islamic Caliphate ==The Islamic Caliphate introduced a new form of tribute, known as the 'jizya', that differed significantly from earlier Roman forms of tribute

