This 92 page book is in the Fontana Modern Masters series.
Though brief, and written 40 years ago, this review of Marx is very insightful. It covers Marx's biography, Marx's analysis of history, economics and politics, the aftermath, and it mentions the post war Marxist apologists, like Adorno, Harbermas, Marcuse and Althusser, who were prominent up to the 70s.
The book dispels many of the misconceptions about Marx. Marx's works were unfinished, and so were his ideas. Marx never mentioned dialectical materialism. Marx actually said "I am not a Marxist". Marx was ambiguous and open-minded. Marx had an appreciation of the successes, as well as the failures, of Capitalism - its ability to raise living standards and enlist technology in its service, as well as realizing how chaotic and inefficient it was, and still is.
This book is not a critique of Marx, but it is not partial or prejudiced. It doesn't try to deify Marx, and McLellan is aware of the limitations of Marx's thoughts. Marx was an all-embracing thinker on a grand scale, who tried to create a unified theory of how the socio-economic and political world functioned. Marx was not always right. How could he be?
Marx was not post-modern, nor was he scientific. But Marx was certainly an original, independent and superior mind. Marx came from a long line of rabbis on both sides of his family, and Marx felt very much at home giving his over-view on world events, and he enjoyed being listened to. Marx was held in awe. "Marx said it, therefore it must be right". Marx can be viewed almost as a pseudo-religious thinker, which is one of the criticisms of Marx that is heard, and maybe that is one of the reasons why Marxism became a substitute for religion for some, and a person reviled and hated by others.
McLellan places Marx as a product of his times, and many of Marx's ideas have been superseded by history, even proved wrong. Thus Capitalism has been far more resilient than Marx thought it would be. Marx firmly believed that inherent in Capitalism were the seeds of its own destruction. Capital would be squeezed, so that profits would inevitably decline. Workers (the proletariat) would be further debased. This hasn't proved to be true.
People - in the developed world, at least - have shared in the successes of Capitalism, although the bottom 10% or so have been largely forgotten, as have those in under-developed countries like Burkina Faso in Africa.
Capitalism has managed to utilize new advances in technology to maintain its profits. Globalization has allowed Capitalism to chase new and cheaper labor markets. Capitalism survives, still lurching from one crisis to another, as Marx predicted.
Marx's theory that the cost of labor is the prime factor that determines the market value of a product, is far too simplistic. Marx never fully appreciated the concept of consumer sovereignty. The market value of a product may be determined by how much people are willing to pay for it.
Marx would perhaps be amazed that people have managed to socialize their jobs, so that the repetitious soul-destroying monotony of the assembly line are mostly a thing of the past - at least, in developed countries. But Marx would have observed that many people all over the world still toil at jobs that have no meaning for them and that create "alienation". (Alienation is the feeling that the product that you have created does not represent a part of you, it is not a creative part of you, and that your time spent doing the job is not the real you. It turns yourself into the other.)
Marx was and still is highly influential, 132 years after his death, and whether you admire him him or you detest him, Marx needs to be read, and assimilated.