Some topics are general and are regarded as 'classical' because they are always relevant across time periods through being relatable even as time progresses. For example, topics or themes about politics and satire would still prevail until now. Other topics or themes (such as viral videos) are only for that particular event and do not always occur, thus they do not prevail in the long run.
Themes that are relevant to many people across generations generally remain relevant over time. Readers across different time periods can relate to such themes, such as socially significant themes like politics, gender dynamics, class inequality, industrialization, types of relationships,
For instance, literatary works that deals with gender dynamics or class inequalities are as important nowadays as it was centuries ago since the remain being a matter of concern for society.
