 Stebbing played a major role in introducing logical positivism into Britain. She first met Moritz Schlick in Oxford in 1930 when they spoke in a panel together at the Seventh International Congress of Philosophy, and Schlick came to England again in 1932 to lecture at King’s College London. In 1934 she invited Rudolf Carnap to give a series of three lectures (later published as Philosophy and Logical Syntax) in London, where Carnap met Russell and A. J. Ayer for the first time. She was on the organization committee for the International Congress for the Unity of Science, which was held in Paris in 1935 and in Cambridge in 1938.