It contained contributions from such figures as the Polish Rosa Luxemburg, the Czech-German Karl Kautsky, and a young Ukrainian Marxist, Leon Trotsky, who became a regular contributor from the autumn of 1902.
Contiña achegas de figuras como a polaca Rosa Luxemburg, o checo-xermano Karl Kautsky e un mozo marxista ucraíno, Lev Trotski, quen se converteu nun colaborador habitual desde o outono de 1902.