What source material they have drawn upon, and whether they have omitted any relevant issues?

Critical Analysis- T. Barkawi and S. Brighton, “Brown Britain: post-colonial politics and grand strategy

Referencing: Chicago 16 footnote style

Provide a brief summary of the key arguments, and reflect critically on the argument put forward. consider how the author’s argument compares to other works in the field, the methodology they have used, what source material they have drawn upon, and whether they have omitted any relevant issues?