Final answer:
The hypothetical reunification of continents with existing country borders would significantly impact international relations, daily life, and globalization, causing changes in travel, trade, culture, and possibly increased cooperation or conflict.
Step-by-step explanation:
If the continents were suddenly smashed back together, forming a modern version of Pangaea with existing country borders, the effects on international relations, daily life, and global structures could be profound and far-reaching. Geopolitical tensions could either escalate or subside, depending on how nations adapt to the new geographical realities. This hypothetical scenario raises questions akin to those around globalization and the erosion of nation-state borders.
International relations might worsen, considering the new proximity would create direct border disputes and likely exacerbate resource competition. However, there is a potential for improved relations, as physical barriers to trade and communication would diminish, possibly leading to increased cooperation. Daily life would certainly change; people could travel by land to what were once distant continents, and the impacts on tourism, economies, societies, immigration, and government structures could be drastic. Culturally, this realignment might lead to a blending of societies, with both positive and negative consequences.
Overall, such a change could lead to either increased conflict or cooperation. It's not clear whether this would be a better or worse world, but it would definitely be different, challenging existing ideas of sovereignty, culture, and identity. As with globalization and open borders, economic growth could either blossom due to the free exchange of goods and ideas or suffer from protectionist policies enacted by states striving to safeguard their interests.