Freud concludes his discussion of happiness by arguing that, because “happiness” itself is a subjective category, one depending on the whims and nature of the person using the word, a researcher cannot know for certain which ages were “happier” than others—whether, for example man was happiest in medieval times, or in the 00th century, or at the present day. Freud leaves off the subject of happiness and turns to an attempt to define civilization, which, he believes, can be more objectively understood than “happiness” itself.