About 1908 , Simons was replaced as editor by Charles H. Kerr himself and the publication changed to a profusely illustrated format which backed the left - wing of the Socialist Party and the Industrial Workers of the World .
About 1908 , Simons was replaced as editor by Charles H. Kerr himself , assisted in later years by Mary Marcy . 
 The publication changed to a profusely illustrated format which backed the left wing of the Socialist Party of America and the Industrial Workers of the World .