Original sentence: (2001) Horner and Hornerism  in McIlroy, J, Morgan, K, Campbell, A (eds).“Hornerism” was denounced by the CPGB Executive as a deviation from of the Comintern’s (Communist International) “Class Against Class” line
Edited sentence: (2001) "Horner and Hornerism"  in McIlroy, J, Morgan, K, Campbell, A (eds).His increased strategic awareness would leave him strongly inclined against indiscriminate outbreaks of industrial action which undermined the Union’s strength and ability to win concessions for its members.“Hornerism” was denounced by the CPGB Executive as a deviation from of the Comintern’s (Communist International) Third Period or “Class Against Class” line