In her view overland conquest by the great empires of early modern Eurasia produced a special form of rulership which gave high priority to the institutionalization of cultural identity.
Crossley suggests that these concepts were encoded in political practice and academic discourse on "nationalism," and prevailed till the end of the twentieth century.
At Swarthmore she was a student of Lillian M. Li and Bruce Cumings, and as an undergraduate began graduate study at the University of Pennsylvania with Hilary Conroy.
She later entered Yale University, where she was a student of Yu Ying-shih and Parker Po-fei Huang, and wrote a dissertation under the direction of Jonathan D. Spence.
After David Farquhar, Gertraude Roth Li, and Beatrice S. Bartlett, Crossley was among the first scholars writing in English to use Manchu-language documents to research the history of the Qing Empire.
She agreed that assimilation and acculturation were part of China's history, but considered "sinicization" to be something that historians had imbued with a charismatic quality with no basis in fact.
In publications in Korea and China since 2008 Crossley has written that there are two trends that are often conflated, one a "Manchu-centered" school and another group who view the Qing empire as a "historical object" in its own right (not only a phase in Chinese history).
On April 20, 2015, the Chinese Academy of Social Sciences published a criticism by historian Li Zhiting[15] of historians he called a "New Qing History" faction, accusing former Association for Asian Studies President Evelyn Rawski, Crossley, Mark C. Elliott and James A. Millward personally as being apologists for imperialism, producing fraudulent history and encouraging "splittism" in border areas.
This followed Internet criticism by some Chinese posters of Crossley's 2011 editorial in the Wall Street Journal, in which she contrasted the international foundations of the 1911 Revolution in China with the narrow nationalism of the hundred-year celebration in 2011.
Whereas Chinese scholars like Li Zhiting represented an older generation of Marxist historians in China, papers by other Chinese scholars like Li Aiyong and Zhang Jian reflected more respected criticisms, using more thorough and careful approaches, such as pointing out the various ways in which the word "sinicization" can be understood, and identifying the limitations of using Manchu ethnicity and language to make an argument against the sinicization thesis.
Subsequently, Professor Liu Wenpeng denounced the concept of "Inner Asia" as used by "New Qing" historians, apparently following Crossley's 2009 discussion of the history of the Inner Asian term.
With its deconstruction of ideas including the contemporary Chinese master narrative of nation-building, and given China's strong sense of victimization and vulnerability the debate has become emotionally charged and politicized to certain extent.
In her own research work in the field of world or global history Crossley is known primarily for arguing, in agreement with a certain number of other historians of China, that not only material but also cultural and political trends produced an "early modern" period across Eurasia from about 1500 to about 1800.
The free applications are specially designed for display of all "horizontally-written" scripts, and integrate functions needed for instant web page management.
Other software makes this famous reference work Eminent Chinese of the Ch'ing Period used by students who do not know the Wade–Giles system accessible, and also integrates to Harvard University GIS database.