The Dark Ages represent an undue concentration on Western Europe.

Evidence

Our use of the phrase ‘the Dark Ages’ to cover the period from 600 to 1000 marks our undue concentration on Western Europe. In China, this period includes the time of the Tang dynasty, the greatest age of Chinese poetry, and in many other ways a most remarkable epoch. From India to Spain, the brilliant civilization of Islam flourished. What was lost to Christendom at this time was not lost to civilization, but quite the contrary. — Bertrand Russell, History of Western Philosophy, 1546

Categorization

• XREF: XREF: Challenges Eurocentric periodization of global civilization.
• corroborated: 2 independent passages support this claim — Bertrand Russell, History of Western Philosophy, 1546