Variable cultural acquisition costs constrain cumulative cultural evolution.

Area of Science:

• Evolutionary Anthropology
• Cultural Evolution Studies
• Cognitive Science

Background:

• Human cumulative culture enables knowledge and technology accumulation across generations.
• Previous models of cultural change often overlook increasing acquisition costs with complexity.
• This can potentially limit the extent of cultural complexity achievable.

Purpose of the Study:

• To investigate the impact of variable cultural acquisition costs on cumulative cultural evolution.
• To determine if acquisition costs can impose an upper limit on cultural complexity.
• To explore how different transmission rules and population dynamics interact with these costs.

Main Methods:

• Review of empirical analyses on the history of science and technology.
• Development of macroscopic models of cumulative cultural evolution.
• Construction of individual-based models simulating cultural transmission and acquisition.

Main Results:

• Models demonstrate that increasing acquisition costs with cultural complexity lead to an upper limit on innovation.
• The rate of cultural evolution is shown to be constrained by the cost of knowledge acquisition.
• Varying cultural transmission rules and population sizes influence the point at which this limit is reached.

Conclusions:

• Cultural acquisition costs represent a significant constraint on cumulative cultural evolution.
• An upper limit to cultural complexity is a plausible outcome of these acquisition costs.
• Understanding these costs is crucial for predicting the future trajectory of human knowledge and technology.