In the theories of Nicholas Humphrey*, it was stated that during most of the evolution of humans, 100,000-10,000 years ago life was 1) more dangerous and 2) society was more oppressive than nowadays.
1) His model suggests that the placebo-effect is possible, because during this dangerous period the saving of the metabolic resources by the health management system, slower but less expensive self-healing processes were adaptive. In safety modern societies, most of us have the resources to use the expensive and quick healing processes, but we need cues to apply them, 'the snake oil, the psychoanalysis, the orgone box, or whatever it is encourages us to do so'.
2) Analogously, conforming the societal norms was more important in our ancestors, but nowadays, in our less oppressive and developing modern society, if we receive the proper cues, we can afford more mental freedom and self-expression.
However, If we take a counter-hypothesis, and state that during the evolution of humans in the hunter-gatherer tribes, life was more safe and society was more supportive, than we arrive to the conclusions, that 1) in individuals of civilized societies, health management system switches to more ancient, slower but cheaper healing reactions, because it senses lack of support and good perspectives. This can be set back by social support or positive expectations - a possible explanation of the placebo-effect. 2) in individuals of civilized societies, self-management system switches to more ancient, self-oppressing, agressive or anxious behavior. This can be set back by cues, e.g. social support or self-esteem, leading to free self-expression and authenticity. Both highly demaning but quick healing reactions and authenticity were adaptive result of our evolution, but the more scarce resources and less support in civilization decreased them, and so we use most of the time more ancient strategies for self-management. These conclusions also fit to what we experience.
Now the question is, how can we compare the hunter-gatherer tribal and civilized lifestyle, regarding the amount of resources, safe-danger, and social support-oppression? What scientific results do we have no this topic?