An exploration of what we can know about what we don't know why ignorance is more than simply a lack of knowledge Ignorance is trending Politicians boast I'm not a scientist Angry citizens object to a proposed state motto because it is in Latin & This is America not Mexico or Latin America Lack of experience not expertise becomes a credential Fake news & repeated falsehoods are accepted & shape firm belief Ignorance about American government & history is so alarming that the ideal of an informed citizenry now seems quaint Conspiracy theories & false knowledge thrive This may be the Information Age but we do not seem to be well informed In this book philosopher Daniel De Nicola explores ignorance -- its abundance its endurance & its consequences De Nicola aims to understand ignorance which seems at first paradoxical How can the unknown become known -- & still be unknown? But he argues that ignorance is more than a lack or a void & that it has dynamic & complex interactions with knowledge Taking a broadly philosophical approach De Nicola examines many forms of ignorance using the metaphors of ignorance as place boundary limit & horizon He treats willful ignorance & describes the culture in which ignorance becomes an ideological stance He discusses the ethics of ignorance including the right not to know considers the supposed virtues of ignorance & concludes that there are situations in which ignorance is morally good Ignorance is neither pure nor simple It is both an accusation & a defense (You are ignorant! Yes but I didn't know!) Its practical effects range from the inconsequential to the momentous It is a scourge but De Nicola argues daringly it may also be a refuge a value even an accompaniment to virtue