I disagree on this one.
If leadership is only measured by our random influence on the lives of others, then we may as well all be leaders in a general sense, since we always influence other lives to some degree, through our social being.
In my opinion, leadership in general, whether good or bad (to stay within the generic question wording) is mainly concerned with the power to persuade others to follow what you do, say or believe in. There were always good and bad leaders, who shared the “leader” label, and who led others through a combination of charisma, eloquence, identification, power, inspiration, love, hate, fear and/or deception.
The good ones lead others to goodness.