Niall Ferguson,
Empire: How Britain Made the Modern World (Penguin, 2004).
Chris Wickham,
The Inheritance of Rome (Penguin, 2010).
الفصل السادس: الأمريكتان
Bruce D. Smith,
The Emergence of Agriculture (Scientific American Library, 1998).
Russell Thornton,
American Indian Holocaust and Survival: A Population History since 1492 (University of Oklahoma Press, 1987).
J. H. Elliott,
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