"No tribe unites with another of its own free will"

This quote by Arthur Keith suggests that people are not naturally inclined to work together with one another. It implies that people are most likely to stay independent and separated from one another, which any cooperation between them is not done out of a desire to interact, however rather out of necessity. This might be due to a range of reasons, such as a requirement for resources, security, or a desire to broaden their territory. It could also be due to a worry of the unknown, or an absence of trust between the two tribes. This quote highlights the value of comprehending the inspirations behind any cooperation between people, and the requirement to recognize that it is not constantly done out of a desire to work together. It likewise serves as a reminder that any cooperation in between people should be made with respect and understanding, and not considered approved.