Confession: I knew nothing about Gordon Childe until seeing your post. I've just been reading a long article published by International Socialism which now seems essential reading (see link below). It seems he was also committed to the Labour Movement, Socialism and the fight against Fascism in the early 20th Century. Conversely, whatever he left as his legacy to prehistoric archaeology, to learn about the man is also to gain fresh insights into the political history of the 20th Century.