Wow. After reading the last review I had to take a look at this since I love Jack London's stuff. Well it may or maynot have been a "socialist screed" but it WAS kinda ham-fisted, beating you over the head with it chapter after chapter after chapter. I still like London but am going to stick with his fiction.
Jack’s book reviews
This monumentally boring book is the best cure for insomnia ever invented. As for the philosophy itself -- I cannot imagine how much better off the world would be today if someone had smothered Marx and Engels in their cradles. Horrible book, horrible "manifesto."