Britannica
Sources used in this answer
Why is it difficult to predict all the consequences of an action?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Utilitarianism
English philosopher and economist Jeremy Bentham's preserved skeleton in his own clothes and surmounted by a wax head, at University College London.
Predicting the consequences of an action is inherently difficult due to both conceptual and practical challenges within utilitarianism.
Conceptual and Practical Challenges
Identifying what constitutes a consequence is not always straightforward, and there is no universal philosophical consensus on what defines an "action" itself. Even when actions are defined, utilitarians face significant hurdles:1
- Complexity of Calculation: Assessing the intrinsic value of outcomes requires comparing the happiness or preferences of many different people. These interpersonal comparisons are often viewed as overly complicated or inexact.23
- Systemic Unpredictability: Many real-world scenarios function as complex systems, where small changes in initial conditions can lead to vastly different, counterintuitive outcomesāa phenomenon known as the butterfly effect. Unlike simple systems, these environments involve adaptive agents acting on local information, making long-term prediction impossible.456
- Measurement Limitations: While early thinkers like Bentham proposed a "hedonic calculus" to sum units of pleasure and pain, such precise measurement is widely considered a practical impossibility.71
Ultimately, because human actions occur within complex, evolving environments, it is impossible to account for every potential ripple effect, rendering the perfect prediction of consequences an elusive goal.51