Thursday, February 26, 2026

We Act in a World of Uncertainty, Not Probabilities

Human actions and decisions occur amid uncertainties and cannot always be predicted by probabilities. This concept is illustrated through tragic events involving backcountry skiing accidents and a fatal traffic collision, showing that expertise and planning can sometimes fail in unexpected ways.

1. Tragic Incidents: The Sierra Nevada mountains in California can be beautiful yet dangerous. Recently, an avalanche claimed the lives of nine skiers who were aware of the risks but chose to ski in an avalanche-prone area.

2. Traffic Accident: Another fatality occurred when Wes, an experienced driver, encountered a traffic pileup. A speeding truck hit his car, leading to his immediate death, despite traffic conditions being familiar to him.

3. Perception of Risk: People often rely on statistics and probabilities to understand risk, like calculating the chance of dying in a traffic accident. However, these probabilities do not capture the real danger of unique events, like avalanches or sudden car accidents.

4. Expertise vs. Outcomes: All skiers in the avalanche were experienced and carried detection equipment, understanding the avalanche risks yet still faced a fatal incident. Similarly, Wes was skilled at driving but was in the wrong place at a wrong time.

5. Mises’ Philosophy: Ludwig von Mises emphasizes that human actions occur within the realm of uncertainty and are influenced by unforeseen variables. While individuals act with purpose and plan based on available knowledge, future outcomes remain unpredictable.

6. Case Probability: The events of the avalanche and traffic accident go beyond mere statistics; they exemplify what Mises termed "case probability" where known factors meet unknown variables. Neither tragedy had predictable outcomes, reinforcing the notion that certainty in planning can often be misleading.

7. Choices and Consequences: The skiers chose to engage in a risky activity during hazardous conditions, while Wes embarked on a routine commute, highlighting how both situations turned deadly unexpectedly. Their choices emphasize the complexity of decision-making under risk.

8. Unpredictable Nature of Life: The article concludes that no amount of expertise can completely safeguard individuals from unexpected events. The tragedies serve as reminders that life is filled with uncertainties, where complete knowledge and preparation can't eliminate all risks.

In a world dominated by uncertainty, even experienced individuals face unpredictability in their actions and decisions. Whether in backcountry skiing or everyday traffic, the risk of unforeseen events leads to tragic outcomes. As illustrated in the discussed incidents, the understanding of risk must recognize the limitations of human foresight and the complexities of life that render absolute certainty impossible. 

https://mises.org/mises-wire/we-act-world-uncertainty-not-probabilities

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