The event that has increased the rate of cultural diffusion since the 1980s is globalization.
Explanation: Globalization refers to the interconnectedness of economies, cultures, and populations, driven largely by advances in technology, trade, and communication. Since the 1980s, various factors have contributed to this phenomenon, including:
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Technological Advancements: The rise of the internet and digital communication has made it easier for information, ideas, and cultural products to spread across the globe. Social media platforms allow for instantaneous sharing of cultural expressions, music, art, and more, leading to greater cross-cultural interactions.
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Trade Liberalization: Increased trade agreements and economic cooperation between countries have facilitated the flow of goods and services, encouraging cultural exchange as products often carry cultural significance and influence.
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Migration: The movement of people across borders has led to the blending of cultures, as individuals bring their traditions, languages, and customs to new environments.
In contrast, the other options—European colonization, the Mexican-American War, and even specific events like regional conflicts or policies—were significant historical events but did not have the same broad, accelerating impact on cultural diffusion as globalization has since the latter part of the 20th century.