When analyzing the effect of a dominant society's culture on a less powerful one, the concept to explore is Cultural Homogenisation. This term describes the process through which elements of the dominant culture spread across and become integrated into the less dominant culture, leading to uniformity or similarity in cultural expressions.
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Thus, when the dominant society influences the less powerful, encouraging a merging into a singular cultural expression, Cultural Homogenisation is the appropriate term.
Cultural homogenization occurs when a dominant culture’s values, beliefs, and practices influence a less powerful society, leading to a reduction in cultural diversity. This often results from globalization and the spread of cultural products from powerful nations, leading to a more uniform global culture, sometimes at the expense of local traditions and practices.