Influence is the raw material of drama. Just as a painter has a special sensitivity and appetite for colour, a musician for sounds, a dancer for kinesthesia, an architect for space, a poet for connotations, a sculptor for form, so has a dramatic actor a special sensitivity and appetite for influence. He feels influence as a palpable substance filling the space between people. He is ready to change others. He is ready to be changed himself. The psychology, the vibes, the needs, the desires, the attitudes are all part of it. He loves to play with it, and eventually he learns to dance to it.
There is a hierarchy of influence, from personal to social to political to historical.