Let's take a side trip to Buddhism as a way of exploring non-western spirituality. Buddhism has a tenant of egolessness. While there are varying schools of thought on how to achieve this and what it means I'm going to just look at one possible interpretation which is reflected in a quote attributed to many including Harry Truman. “It's amazing what you can accomplish if you do not care who gets the credit.” In this quote, ego can be seen as doing something for the recognition of doing it (or opposing a course of action because it did not originate with oneself). If one's main concern is accomplishing a task (or completing a mission) in the most beneficial (or least harmful, or most logical, or most economic) way without regard for who does what or how praise or blame is spread around afterwards then all energies can be directed towards solving the problem. This would be a positive way of looking at egolessness as a benefit to group problem solving (and by extension to leadership).
Moving from Buddhism to broader (or more inclusive) spirituality, one function of spirituality in most of its forms is to remove the singular egoistic perception of self away from the center of one's perception of (and dealings with) the world at large. While this sounds logical and easy (i.e. most would agree that no single individual is the center of the universe around which all else revolves) it runs counter to our felt subjective experience of existence. From each of our individual perspectives, the world is divided into two camps. Me (at the center of my existence through whom perceptions, feelings, and thoughts are experienced) and everyone else (all that I observe who are outside of my physical presence and whose own subjective experiences I can only guess at or try to interpret through what they say and do). So setting the "me" aside in dealings with the outside world is actually a monumental effort. And here is where spirituality is a key asset. Spirituality (or at least the aspect of it I'm using in this meditation) is about developing and awareness of and relationship with a larger perspective of experience. A perspective that acknowledges unknowable (or at least not completely imaginable) aspects of the universe which we cannot know empirically and must take on faith, realizing that full knowledge is not attainable (at least in this lifetime).
Acknowledging a larger scheme of existence pulls us out of subjectivity and gives us a perspective from which (I believe) it's possible to see different possible courses of action when attempting to solve thorny leadership problems. Different people (or different cultures) each conceive of this spiritual dimension differently and there are elaborate mythologies (which I believe all religions to be) which speak with differing levels of authority to different peoples. But I believe the end result is the same: the establishment of a worldview in which the importance of an individual ego is lessened and the ability to conceive of (and act in accordance with) a greater good is achieved. The bottom line of all this metaphysical mansplaining rambling is that I believe an egoless spiritual perspective is an essential element of leading in a socially responsible way. And a necessary element to creating this spiritual worldview is the ability to weave a compelling story (since this worldview is by its non-empirical nature, metaphorical….)