The Cambridge Companion to the Age of PericlesMid fifth century Athens saw the development of the Athenian empire, the radicalization of Athenian democracy through the empowerment of poorer citizens, the adornment of the city through a massive and expensive building program, the classical age of Athenian tragedy, the assembly of intellectuals offering novel approaches to philosophical and scientific issues, and the end of the Spartan Athenian alliance against Persia and the beginning of open