How do we want to define “responsible”?
Definition 1: “Responsible” means “performed an action”.
Example: I threw the ball, therefore I was responsible for the ball being thrown.
Definition 2: “Responsible” means “should be held accountable for”.
Example: I may or may not have been the thrower of the ball, but the consequences of the ball being thrown are my fault. Maybe I was supervising the thrower of the ball, or I convinced someone else to throw the ball, or maybe I was the thrower after all.
I’m sure there are other definitions that I’m not thinking of.
It sounds like most answerers of this thread are concerned with who should be held accountable (faulted, blamed, punished, lauded, rewarded, etc.) for actions. So let’s go back to the ball.
Why would I choose to throw a ball? Does it matter if someone says “Hey, throw me that ball”? Does that person share some responsibility for the ball being thrown? What if someone puts a gun to my head and says, “Throw the ball or I’ll blow your brains out”? Then does that person share responsibility for it?
What if I have a mental condition that causes me almost unbearable anxiety if I don’t throw the ball? Then am I still responsible for throwing it? Am I equally as responsible as someone who did not have that mental condition and chose to throw the ball anyway? What about another mental condition that makes throwing balls so incredibly pleasurable that it’s hard to resist? Do you see any difference between someone who throws a ball to avoid suffering versus someone who throws a ball to experience pleasure?
I am also of the school of thought that our decisions are 100% a consequence of our genes and experience. So in an objective sense, from the Universe’s standpoint, I shoulder no responsibility, because what am “I” except for a gene/environment interaction?
But from the standpoint of the human race and law and morality, I should still face consequences for my actions—because aren’t those consequences part of the environment that will shape my future decisions?