Defining leadership

A couple of less common definitions from an Acronym post:

“The capacity of a system to sense and shape its future”
(attributed to Rosetta Thurman although maybe from Peter Senge or Otto Scharmer. See the post).

Also may be a variant on:
"the capacity in the human community to shape the future." from Peter Senge.

As commented by Jamie Notter in the post, the focus on leadership as a system role rather than as a heroic individual characteristic opens up thinking about 'leading organisations'. I've often seen and heard the concept of a leading organisation in purpose/mission discussions in associations. But there is rarely a sensible discussion on what this means - what work does this imply, and what responsibilities does it carry?