For learning cosmology, a solid understanding of general relativity (GR) and some quantum field theory (QFT) is essential. The discussion highlights the varying prerequisites for different cosmology texts, specifically mentioning Steven Weinberg's books. Weinberg's "Gravitation and Cosmology" (G & C) is noted as not requiring extensive QFT knowledge, making it a potential starting point for those familiar with GR at the level of Schutz. In contrast, his more recent book on cosmology may demand a stronger background in particle physics and QFT, particularly in quantum chromodynamics (QCD) and electroweak theory. The consensus suggests that while foundational knowledge in particle physics is beneficial, it may not be strictly necessary for all cosmology texts, depending on the specific book chosen.
