Anyone can write a consumerism essay. Consumerism is a broad and complex topic, and there are many different angles and perspectives from which it can be approached. Depending on the focus of the essay, the writer might be a student, a researcher, or someone with personal experience or expertise in the subject. Some potential topics for a consumerism essay could include the effects of consumerism on the environment, the psychological effects of constant consumption, the role of advertising in promoting consumerism, or the ethical implications of consumer culture. The most important thing is to have a clear thesis and to support it with evidence and analysis.