When someone chooses not to follow public health guidelines around the coronavirus, they’re defecting from the public good. It’s the moral equivalent of the tragedy of the commons: If everyone shares the same pasture for their individual flocks, some people are going to graze their animals longer, or let them eat more than their fair share, ruining the commons in the process. Selfish and self-defeating behavior undermines the pursuit of something from which everyone can benefit. – The Conversation