Mao 's New Democracy explains the Bloc of Four Classes as an unfortunate but necessary consequence of imperialism as described by Lenin , while critics on the radical left generally denounce the strategy as a futile and / or dangerous '' lesser evil '' policy .
Mao 's New Democracy explains the Bloc of Four Classes as an unfortunate but necessary consequence of imperialism as described by Lenin . 
 Critics on the radical left generally denounce the strategy as a futile and / or dangerous '' lesser evil '' policy .