>Early Middle Ages were probably a point in history where Europeans were at their highest level in terms of overall health and quality of life.

No antibiotics, modern sanitation, internet, refrigeration orcentral heating, not much education, massive infant mortality and no way to travel faster than a horse. I don't see how that equates a high quality of life.

Would you swap places with them - given that you are far more likely to be a serf than an aristocrat?