Answer
G. E. M. Anscombe's pivotal role in disseminating Wittgenstein's philosophical ideas lies in her editorial contributions. Her meticulous work in editing and translating his writings, particularly the posthumous publication of his masterpiece "Philosophical Investigations," made Wittgenstein's complex philosophical insights accessible to a broader audience. Anscombe's dedication ensured that Wittgenstein's profound impact on 20th-century philosophy could reach its full potential.