You have probably heard the phrase “We are all to blame”.
I want now to argue that whoever says this is committing a fallacy, and for this, I have to build some argumentative infrastructure.
Some explanations first. I was motivated to write this piece after some politician has said somwhere online that “we are all to blame for [some unfortunate situation which is not really relevant to this piece]”. This has pressed my berserk buttons (all of them), and I had to think why I am so displeased with these words coming from this person. So, enjoy the results of my thoughts.
In today’s moral consensus (and my personal view), blame (and its less offensive sibling, responsibility) is a function of power. If you can change the situation, you are to blame. If you cannot, you are not. So far, so simple, and up to now, there is no contradiction to everyone being to blame for anything. However, the statement misses several issues.
First, what is the consequence? Usually, “we are all to blame” results in “you should pay and atone”, or just a deep-sounding “we should all atone”. However, other than sounding deep, these words do not really mean something material by themselves.
Second, what is the measure? The implied connotation is that everyone is equally to blame. And in the discussed cases, this is as much true as following “real possibility” from “nonzero probability”. In our world, the share of responsibility for any outcome is not equal. A politician has more power to change enviromental policies than a nurse, and a doctor has more power over a patient than a schoolchild 50 kilometers away, even taking into account that the schoolchild has the theoretical option to study medicine. But if no measure is supplied, the implied meaning is that everyone is equally responsible, by which no one is actually responsible.
What do we have in the end? I propose a heuristic: Everyone saying “We are all to blame” implies “we are all equally responsible” and tries hereby to scatter her share of responsibility. In the best case, this is a fallacy. In the worst case, this is an insult to reason and an attempt to evade judgment.