A comparative analysis is a critical investigation of two or more entities/ subjects/ processes/events, etc. in order to pinpoint similarities and differences between these and by doing so, to gain a deeper understanding of the subject. Such an analysis could involve literature works, movies, main or secondary characters, historical figures, civilizations, states/ international organizations, companies, corporate strategies, natural disasters, philosophies, religions, commercial advertisements, and many other things. It might be useful to go through some essay samples before writing your own comparative analysis. This is because there could be more ways to structure such essays (e.g. similarities and differences could be combined in standalone blocks, or each paragraph could cover both similarities and differences related to a specific trait).