Elon Musk recently recommended a book called "1493: The World History of Species Exchange", which tells the grand history of how global life, crops, diseases, populations, and cultures underwent profound restructuring after Columbus' "discovery of the New World". This global species exchange has shaped the world civilization we know today and marked the beginning of true globalization. It can be seen that Mask is an entrepreneur who strongly advocates trade liberalization, which is the source of the rapid development of human civilization. Now Trump's trade protection is against the law of heaven and the law of historical development, and will be backfired! The book provides many examples, for example, the Industrial Revolution required three basic materials: steel, fossil fuels, and rubber. Rapidly industrializing European and North American countries were able to obtain far more steel and fossil fuels than needed, but ensuring rubber supply became a top priority. The discovery of Brazilian rubber trees in South America and their large-scale introduction to Southeast Asia for cultivation contributed to the sustainability of the Industrial Revolution. For example, the large-scale introduction of crops from the Americas to Europe and China has promoted the harvest and output of food crops, leading to a population explosion, which in turn has accelerated the development and progress of world civilization. The key agricultural activity is potatoes 🥔 And sweet potatoes 🍠， Potatoes have the best elements to sustain life. It contains all essential nutrients except for vitamins A and D, which can be provided by milk. In Smith's era, the diet of poor Irish people was mainly composed of potatoes and milk. The introduction of potatoes had an impact on modern times comparable to the invention of the steam engine. Potatoes drove a significant increase in population in Europe and Asia, with the more potatoes, the more people there were. This book '1493' is worth reading. Audio book link: https://www. (youtube.com)/watch? v=y1eSJe1m-uY