Leadership, and leaders, considered as an emergent agency or salient property of self-organising, self-propagating complex systems somewhat inverts classical hierarchical thinking on the matter. Questions as to the specific historical tenure and extended longevity of an ideological vocabulary or conceptual system associated with a specific instance of admirable leadership may always already be to have missed half the point. Beyond aptitude and intelligence, great leaders are products of their contexts and as nodal focal points provide that reflexive pivot through which a context and historical moment might observe and understand itself, even if in retrospect.
Organisational cultures are not born fully-formed (or in any sense static or complete), they are best cultivated and nurtured. For better or for worse our leaders reflect the ground from which they grow and while a rare human being might arise in a specific constellation of social and historical circumstances, the best we can do towards producing great leaders may be to provide the most fertile and open opportunities and incentives within our organisations for such unique creative intelligence to percolate up to the roles they are best-suited to perform.