Core Perspective - The book "Crop Migrations in World Civilization" explores the historical context of crop migrations as a significant aspect of human civilization, emphasizing their role in economic exchange and cultural dissemination [2][3][4] Group 1: Historical Context and Significance - Crops serve as witnesses to cross-regional exchanges, revealing the economic, social, and cultural factors behind their migrations, thus linking crop movements to the development of world history [2][3] - The concept of "crop landscape" is central to the book, highlighting the organic combination of crops and related elements (such as planting techniques, market demand, and cultural values) in specific times and places [2] Group 2: Case Studies and Examples - The book presents various crop migration stories, such as the journey of the date palm from ancient Sumer to modern California, illustrating how crops connect different civilizations across time and space [2] - Specific examples like yam from the Trobriand Islands, sweet potato from the New Guinea Highlands, and cassava from the Amazon basin demonstrate the crucial role of these tuber crops in local food sources and cultural identity [3] Group 3: Interactions and Influences - The migration of crops also facilitated the spread of related agricultural techniques, dietary cultures, and religious beliefs, promoting mutual exchange among different civilizations [3] - The book emphasizes the role of "non-human actors" in crop migrations, such as the impact of pathogens on rubber cultivation and the cultural significance of elephants in Indian history, showcasing the complex interdependence between humans and non-human entities [3]