The middle class refers to a social group positioned between the upper and lower classes, generally characterized by income, education, and profession. Historically connected to capitalism and political debate, its limits remain flexible, varying from income percentiles to OECD standards.
Writers such as Jack London portrayed it as a "pygmy between two giants," caught between the elite and the working class, while Stephen Graham emphasized its tendency to imitate both the wealthy and the poor. H.G. Wells described it as a delicate layer of officials and professionals living in uncertain comfort. These viewpoints highlight the middle class’s dual function as both a stabilizing element and a vulnerable group, illustrating its contested position within social hierarchies.