Leadership is not a gene but muscle and unlike genes muscle get stronger the more you use them. To become a good leader you have to continuously improve yourself on many levels. This varies to create a solid support group to accepting that there will be resistance by one group/person. Or to accept that a lot of sacrifice has to be made. So eventually, having a pre-disposition (leadership gene) is not enough to carve into a solid leader.
To get back to the social structures, would Einstein / Newton / Tesla really be one of the greatest scientists if they did not had the support in the end by society, or when one of these wear born in an extremely poor environment without the possibility to read books and had the time to explore ‘great’ things? No, they had the predisposition (intelligent, wise, ambitious endurance, etc) to be great leading scientist and, eventually definitely not in the beginning, got support from peers and the scientist community.
Related: Leaders Born or Trained?
