The phrase "age of ignorance" refers to a period in history when people lacked knowledge about a particular subject. Some synonyms for this term include the "dark ages," "era of ignorance," "period of obliviousness," and "time of naivety." These phrases all convey the idea that people were uninformed or unaware about something. Other similar expressions include the "time of innocence," "epoch of simplicity," and "era of limited understanding." Regardless of the synonym used, it is commonly understood that the "age of ignorance" was a time when people did not have access to the information and knowledge that they do today, which makes it an important period in human history to study and reflect upon.