This video explores how to create sustainable systems through systems thinking. Using the fisheries model in particular, it explains how economic growth, technological advancements, the role of markets, government policies, and social inequality can destabilize systems and lead to collapse. Ultimately, in order to build a sustainable system, we emphasize that it is important to set the goal of 'sufficiency' and to understand and manage the various feedback loops within the system.

1. Unsustainable fishing systems: the paradox of growth and collapse 🎣

The speaker explains the fishing industry as a prime example of an unsustainable system. Initially, as the catch increases, profits increase, and these profits in turn increase investment, which leads to the creation of more fishing boats, creating a positive feedback loop. This forms a growth loop or vicious circle that leads to "more fishing boats → more catches → more profits → more investment → more fishing boats" and the catch increases exponentially.

But this growth doesn't last long. If too many fish are caught, fish populations begin to decline, which leads to lower catches and lower profits. Eventually, a negative feedback loop kicks in, as investment stops and the number of fishing boats decreases, forcing the system to stop growing and find balance. The speaker describes this as a situation where "just enough profit is made to replace depreciated fishing vessels," at which point fishing fleet growth stops.

"More fishing boats, more catches, more catches, more profits, more profits, more investment, more investment, more fishing boats. This is what is causing the exponential growth of fishing fleets."

"This is called a negative feedback loop. A negative feedback loop acts to return the system to equilibrium."

2. Two sides of technological development: Disruptive innovation 💥

The problem is that technological advancements make this situation even worse. The speaker uses models to show what happens when fishermen are given more effective fishing techniques, including "better boats, the ability to stay at sea longer, radar to find fish." At first, the catch rapidly increases and the number of fishing boats increases rapidly, but soon the fish population decreases sharply, leading to an oscillation in which investment in fishing boats decreases and the fish population recovers.

These oscillations occur because the feedback loops that stop investment in fishing boats are operating too slowly. Investment continues until the number of fishing boats becomes too large, and investment stops only when the catch plummets, causing the number of fishing boats to decrease and the fish to recover, repeating the pattern. This shows how systems struggle to adapt to each other.

"It's a predator-prey curve where the fishing boat is the predator and the fish are the prey." "These oscillations are due to the feedback loop running a little slower, which stops investment in fishing boats."

But with the introduction of more powerful technologies, such as "drift nets and shipboard freezers", the situation changes completely. The number of fishing boats continues to increase and the fish population continues to decline, eventually leading to crash. This phenomenon occurs when the catch exceeds the fish's ability to reproduce, reaching a point where even the reproduction rate slows down. At this point, the system enters an erosion loop and becomes unrecoverable.

"Fish populations continue to decline, fishing fleets increase, and we reach a point where we have surpassed the peak of the fish reproduction curve." "The more fish we catch, the more we reduce fish reproduction. Systemically, this is an erosion loop."

This stock collapse is characterized by initially peak catches and seemingly unproblematic events. If you just look at the catch, you might think, "The world's catch has peaked, and there doesn't seem to be any problem." However, disaster can only be predicted if we recognize the decline in fish populations in advance. In fact, the speaker warns, he points out that most major fisheries around the world are showing this pattern.

3. Market and government failure: a deteriorating system 🚨

The lecturer points out that the three factors that are commonly believed to save the system, namely growth, technology, and market, are actually the main causes of unsustainability.

• Growth: Companies' desire for limitless growth leads to fishing beyond sustainable levels.
• Technology: Technological advancements increase productivity in the short term, but accelerate resource depletion if uncontrolled.
• Market: The market price system should play a role in preventing resource depletion, but in reality it does not. Particularly when income distribution is highly unequal, a wealthy minority can consume scarce resources (e.g. tuna) no matter how high the price, weakening the price signal that prevents resource depletion.

"Growth, technology, markets. The three things our culture teaches us will save us are the cause of this particular tragedy, this particular model."

In addition, the role of government is also critically analyzed. The government provides subsidies to consumers to maintain consumption even when fish prices rise, and provides subsidies to producers to encourage them to continue fishing even if it is not profitable. This weakens the negative feedback loop that is supposed to curb resource depletion, accelerating the collapse of the system. In fact, the lecturer emphasizes that fisheries around the world receive far more subsidies than the value of the catch.

"What are governments doing? They are undermining the negative feedback loop with consumption subsidies that will reduce demand when resources become scarce." "And production subsidies are dampening the market response that would stop investors from overinvesting."

4. 'Success leads to success' system and inequality 📉

The lecturer explains the structure of the 'success to the successful' system by comparing it to the Monopoly game. At the beginning of the game, everyone starts out equal, but the lucky few gain more wealth and build hotels, generating greater profits, which in turn leads them to accumulate more wealth. Meanwhile, those who fall behind continue to pay the bills and become poorer.

"The game of Monopoly is based on the system principle of 'success leads to success'. The more fortunes you gain in the game, the more power you have to extort more money from others to gain more fortunes."

This 'success begets success' loop appears across social systems and is a major reason for the persistence of poverty and inequality. The rich become richer, the powerful become more powerful, and those who are not rich lose the ability to stand up for themselves. Numerous social mechanisms deepen these inequalities, including differential education, interest payments, unfair health care systems, and racial discrimination.

"The world is full of a 'success begets success' loop. This is the main reason poverty and inequality persist."

The speaker introduces a negative feedback loop that can operate in reverse of the 'success leads to success' loop. These are devices intended to reduce inequality and return the system to a balanced state.

• Equal education for all
• Low Interest Rates
• Support for the poor
• Progressive tax, inheritance tax

However, the gap between the rich and the poor is currently growing around the world, and these inequality reduction mechanisms are being weakened. Additionally, poverty and population growth form another 'success begets success' loop that reinforces each other, resulting in a vicious cycle in which the poor have more children.

5. Warning of global system collapse 🌍

In addition to fishing, the speaker uses the example of the logging industry in the Philippines to once again show how resource abuse and collapse occur. In the post-war Philippines, a 'success leads to success' loop operated in which a small number of families accumulated wealth by selling trees, which led to logging that led to the near destruction of tropical forests, which eventually led to their collapse.

Additionally, a world model explains how these system dynamics operate on a global scale. This model has the same basic structure as the fishing model, with the constant pursuit of growth, a 'success begets success' loop, and a weakening of the feedback loops that are supposed to balance the system all coming together to lead to collapse.

Using data from the early 2000s as an example, the speaker points out that even when population growth is slowing, the economy is growing, and technology appears to be solving the pollution problem, food per person has already begun to decline. This means that while things may seem fine on the surface, important indicators are already showing signs of collapse.

"If you look at it from 2000, things don't look that bad. The population is growing, but it's slowing down. The economy is growing beautifully. Resources are shrinking, but there's still a lot left. Pollution is building up, but we're fixing it technologically. But food production per capita already started to decline in 2000."

6. Insights for a sustainable system ✨

The lecturer reveals that he has devoted his entire life to research to prevent the collapse of this system since the 1970s, and presents important characteristics for changing an unsustainable system into a sustainable one.

The most important thing is the goal of the system. It's not just about growth, it's about having meaningful and satisfying goals - the concept of 'sufficiency'. Because aiming for growth on a finite planet is bound to be unsustainable. Pursuing true human satisfaction and happiness should be the goal of a sustainable system.

"Goals are the defining characteristic of the most important system: a meaningful and morally satisfying goal of 'sufficiency'. To aim for growth is to ask for unsustainability on a finite planet."

finish

The speaker highlights the importance of systems thinking through issues of fisheries, social inequality, and global resources, showing that many of the problems we face today result from complex feedback loops and 'success begets success' structures. We emphasize that for a sustainable future, fundamental changes are needed, including setting a goal of 'sufficiency' beyond simple growth, understanding various feedback loops within the system, and redefining the roles of the market and government. These insights provide important implications for solving complex problems facing humanity even in 2026. 💡