In this blog post, I will summarize the causes of the uneven development of human civilization based on Jared Diamond’s ‘Guns, Germs, and Steel’, and add my own thoughts.
The Book and a Personal Turning Point
“Guns, Germs, and Steel” is a book that offers a fresh perspective on the origins of civilization through the three key factors that shaped human history. I love to travel and often visit cultural heritage sites and artifacts across the country. In the process, I was always surprised by the fact that even within the same peninsula, the types and characteristics of cultural heritage vary from region to region.
On one such trip, I visited the site of a temple that had burned down during the Joseon Dynasty. There were almost no traces left; only the foundation stones remained in a desolate field, and at first, I felt a sense of frustration, wondering, “Why do I have to visit a place like this?” However, after listening to my father’s explanation, I realized that the surrounding geographical and ecological conditions were more important than the site itself.
The temple was built there because the terrain—with mountains behind for easy access to firewood and rolling hills stretching out in front—was ideal for the formation of a village and for farming. This taught me that ecological and geographical factors, as well as political, social, and economic ones, are crucial when interpreting historical significance. Jared Diamond’s ‘Guns, Germs, and Steel’ is a book that analyzes the origins of human civilization from precisely this perspective.
The Book’s Core Questions and Approach
The author focuses on issues that people take for granted and never even question. For example, why are Western societies strong and wealthy, while some regions are weak and poor? Why did some societies become colonies, while others became conquerors who dominated the world? These questions ultimately lead to how humanity, starting from primates in Africa tens of thousands of years ago, migrated, adapted to various environments, and formed societies.
Diamond explains in detail how geographical conditions and environments over the past 13,000 years have influenced the people living on each continent. He develops his argument using a wealth of data, covering a wide range of topics including human diversification and migration, the domestication of animals and plants, the emergence and evolution of pathogens, and the discovery and spread of technology.
He argues that the differences in the trajectories of human societies are due to environmental differences, not biological ones. He emphasizes the importance of the environment by arguing that prejudices such as racial superiority are nothing more than baseless beliefs, and by positing that if the locations of human populations had been reversed, the same outcomes would not have occurred.
Four Key Factors Shaped by the Environment
The environmental factors presented by Diamond can generally be summarized into four categories. All of these had a decisive influence on the pace and direction of civilizational development. Examining each in turn, they are as follows.
First, the intercontinental differences in wild flora and fauna that served as the raw materials for domestication and crop cultivation. Food production is necessary to accumulate food surpluses, and these surpluses lead to population growth, specialization, and military and political superiority. However, only a small fraction of species worldwide were suitable for domestication and crop cultivation, and their distribution varied by continent. While Eurasia had a relatively large number of candidate species for domestication and cultivation, the number was small in Africa and the Americas, resulting in differences in the pace of food production and social development.
Second, the geographical characteristics within continents that affect the speed of diffusion and migration. Eurasia has a long east-west axis, making diffusion between regions with similar climate zones and ecosystems easy.
In contrast, Africa and the Americas are elongated north-south, resulting in abrupt climate changes and numerous ecological barriers, which slowed the spread of crops, livestock, and technologies. Since technological innovations and political institutions were largely transmitted from other societies, the speed of diffusion had a significant impact on development.
Third, the degree of isolation or connectivity between continents. Over the past several thousand years, exchanges between Eurasia and sub-Saharan Africa were relatively easy, allowing some African livestock to be introduced, but exchanges between the Eastern and Western hemispheres were limited. In particular, Native American societies did not receive many useful cultural artifacts from Eurasia. Australia, too, was significantly isolated from Eurasia by the Indonesian archipelago, resulting in almost no cultural exchange.
Fourth, the difference in continental area and total population size. A large area and a large population increase the number of potential inventors and competing societies, thereby promoting innovation. When multiple competing societies exist, technological and institutional improvements for survival are accelerated. In this regard, Eurasia had an advantage over other continents due to its larger scale and greater number of competing societies.
Specific Examples and Further Discussion
Combining these four factors explains why sedentary societies and agriculture developed first in certain regions, and why, as a result, specific regions accumulated technological, political, and pathogenic resources, gaining an advantage over others. For example, Eurasia was able to develop rapidly due to the diversity of livestock and crops, the ease of east-west diffusion, and the combination of vast land area and population competition.
In contrast, the Americas and Australia faced difficulties in the spread of culture, and with fewer candidate species of livestock and crops, they struggled to develop at a similar pace. In the case of Africa, ecological barriers within the continent and the distribution of candidate species also limited the speed of development.
A comparison between China and Europe is also intriguing. Diamond argues that while China possessed the world’s most advanced civilization until the 15th century, it subsequently fell behind Western societies due to the issue of “over-regulation of competition.” When a society remains politically unified for a long time and decisions made by a single regime are applied broadly, innovation by specific individuals or groups can be constrained. As seen in the case of the Zheng He fleet’s expeditions, progress was halted when political decisions banned navigation, even though the technology already existed. Conversely, in Europe, the presence of multiple competing nations meant that a ban in one region did not affect others, and competition served as a motivation for other countries to catch up and gain the same advantages.
Misunderstandings of Geographical Determinism and Modern Implications
Diamond’s arguments are often met with the criticism of “geographical determinism.” This interpretation suggests that if everything is determined solely by the environment, human creativity and individual will are ignored. However, the author does not deny human creativity. Rather, he argues that certain environments provided a richer supply of materials and conditions conducive to invention and innovation, and that these differences had a significant long-term impact.
This book is also useful for understanding today’s international inequalities. It offers the perspective that the wealth gap between nations is not simply a matter of cultural or biological superiority, but rather the result of historically accumulated environmental differences and the resulting social responses. This perspective helps foster a critical view of racially discriminatory interpretations or colonialist justifications.
There are also lessons to be learned in terms of organizational management and policy-making. The direction and pace of an organization’s development depend on the relationship it forms with its surrounding environment. The author believes that competition and openness promote innovation; while excessive competition is problematic, a complacent state with no competition at all is also problematic. As seen in the cases of Apple and Microsoft, external competition and openness are key factors in organizational development.
In conclusion, “Guns, Germs, and Steel” not only offers exceptional insights into the driving forces behind the ancient world but is also useful for reflecting on modern issues of inequality and reviewing our policy directions. Presented with extensive data and meticulous argumentation, this book offers a fresh perspective on the interactions between history, the environment, and human society.
