Postmodernism … suggests people to buy many things they don’t really need.

Postmodernism is more focused on analyzing cultural texts, power structures, and representations than on directly encouraging consumer behavior. While postmodern theorists have critiqued consumer culture and analyzed how advertising creates desires, they don't typically 'suggest people to buy many things.' If anything, postmodernism encourages critical reflection on consumerism rather than actively promoting unnecessary consumption. The claim that postmodernism encourages buying unnecessary things mischaracterizes its critical, analytical approach.