I reproduce the last paragraph of this blog, with an intention to write my own views thereon:
“The truth is that most special people are lonely, and have little impact on the world. And in the long run, group movements are what change history, and being part of a movement is what makes a person an instigator of change.”
In the present day organization, irrespective of the basis of its existence, no one individual can wholly claim the credit [or discredit] for what has happened [or not happened or not happened the way it ought to have happened].
To be fair, one can have influence on the goings-on.
The extent of the impact of the influence is again dependent on the one who is influencing, those who are being influenced, the then dynamics of interaction of influence-giving-and-taking paradigm and the time frame reference for its subsequent review.