Ludwig Wittgenstein, one of the most influential philosophers of the 20th century, profoundly shaped modern thought, particularly in the realms of language, logic, and the philosophy of mind. His philosophy spans two distinct periods, marked by an evolution in his views on the relationship between language, meaning, and reality. Wittgenstein's work challenges the way we think about and use language, positing that philosophical problems often arise from misunderstandings of language and its limitations.

Wittgenstein's early philosophy, as presented in his landmark work Tractatus Logico-Philosophicus, was grounded in the belief that language could mirror the structure of reality. According to his "picture theory of meaning," words and sentences are pictures that represent facts in the world. He argued that the limits of language are also the limits of the world, and anything that could not be meaningfully expressed through language was simply beyond the scope of philosophy. This view led him to conclude that many traditional philosophical problems were nonsensical, arising from a misuse of language.

However, Wittgenstein underwent a significant philosophical transformation after his work on the Tractatus, largely due to his dissatisfaction with the results of his early approach. By the time of his later work, particularly in Philosophical Investigations, Wittgenstein had rejected the picture theory of meaning and developed the concept of "language games." He argued that meaning is not inherent in words themselves but is derived from their use in various social contexts. Language, for Wittgenstein, is a tool embedded in human practices and activities. He claimed that understanding language requires understanding the ways it functions in specific contexts, challenging the idea of a fixed, underlying structure of meaning.