i completely agree with you that hockey has a smaller talent pool than say soccer or basketball. apart from the obvious different in ease of entry to the sports, hockey is a cold weather sport native to a small portion of the world. any sport where canadians predominate is by definition drawing from a small catchment. because of this simple math dictates that nurture will have a better shot in hockey at overcoming nature, and well prepared kids can overcome some degree of talent deficiency. but i think you are overstating the reality of this. the dynastic nature of the sport is the exception not the rule. only one sutter kid has had anything like the career of the brothers. there are exceptions, but the vast majority of male children of pro-hockey players fail to follow their dads, even though the vast majority do play hockey and receive encouragement, support and mentoring from their family and can benefit from connections and name recognition. the reality is that, even in hockey, nurture overcoming nature is the exception rather than the rule. the nurture kids can get pretty close, but the most genetically talented kids do generally prevail.