Portrait of young Tsukunft (the youth movement of the Jewish Socialist Bund) activists. The banners read (in Yiddish): “Knowledge Is Power!
or, rather, ‘visn is makht! eynigkayt iz makht!‘
so, ‘Knowledge is Power! Unity is Power!’ would be the whole thing.
here’s a selection of really amazeballs images associated with the Labor Bund hosted by YIVO, if you’re interested.