Final answer:
The pan-ethnicity is shaped by historical events, cultural influences, economic developments, and political changes. Examples include the influence of Greeks and Romans in Europe and the role of geography in shaping ethnic identities.
Step-by-step explanation:
The pan-ethnicity shaped by three structural factors of historical events, cultural influences, economic developments, and political changes can be observed in various regions and time periods. For example, in European historical development patterns, the influence of Greeks and Romans in shaping ideas of democracy and empire can be considered as historical events and cultural influences respectively. Additionally, the creation and erosion of ethnic identities are influenced by factors such as geography, language, appearance, national heritage, and religion, which fall under the category of cultural influences.