Prior to the pandemic, I had the opportunity to visit Hadrian’s Wall in Northern England and, soon after that, the Great Wall of China. Seeing these monumental structures set in rugged landscapes, I could not help but ponder the courses of great civilizations and the energy produced when different people and cultures come into contact. Contacts between these cultural tectonic plates sometimes produced great conflicts, but they also became the places where ideas were exchanged, where commerce thrived, where societies evolved and where old ways of thinking gave way to new.

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