For nearly all its existence since Lenin's death in 1924 Trotsky (aka Lev Davidovich Bronstein) was Satan in the Bolshevik's manichean view of the world. Most of the purges of the 1930s were allegedly meant to cleanse Soviet society and its key institutions (the Communist Party, the unions, the Red Army, the intelligentsia) of the Trotskyte taint that, like some sort of Original Sin, pervaded the proletarian dictatorship. Stalin tried to erase Trotsky from the history of the Revolution. He even erased Trotsky's physical attributes, not just by killing him in 1940, half a world away, but by obliterating his likeness wherever it might have been found.
This book, published fifty years ago, tried to counter the Stalinist plot against Trotsky by vindicating his key role in the 1905 and 1917 revolutions, in the Civil War and in the establishment of the Red Army and the Soviet state. The author partially succeeds. Here we see Trotsky in all his glory, as perhaps he would have liked to be remembered, as a child prodigy who from humble rural beginnings quickly found his way in the world, as a professional revolutionary, as a brilliant polemist and orator, who even as a young man was seen as worthy counterpart to Lenin, and far above the rest of the Party, as a good hearted man who tried to promote harmony within the Party and failed at it, as a cultured, civilized "westernizer", much more appealing than the brutal Stalin, who came straight from the "log cabin" of czarist barbarism. He also came up with many good ideas, such as Lenin's New Economic Policy. Deutscher also gives us some of the darker sides to Trotsky's scintillating personna. He was proud and haughty, but brittle. He was abusive to others, often unnecessarily. He often let abstractions and daydreams take the place of reality. And he came up with many bad ideas, such as War Communism and the Militarization of Labor.
But, given Deutscher's profile (he was a Trotskyte) the book is often a competent whitewash. The author shares Trotsky's (and the Bolshevik's) worldview to a great extent, and sees the October Revolution as a worthy action. Mostly, he takes Trotskyte and Bolshevik motives as justification for their actions. He portrays opponents (such as the White Guards and nationalist Ukrainians and Poles) as illegitimate. Nowhere does the awfulness of Soviet rule, and the brutality of the Bolshevik leaders come through, except perhaps in their remarkably abusive writings. To find such bitchiness nowadays one would have to refer to the academic world, where the nastiness is commensurate to the irrelevance of that which is being discussed.
Also, the book is often not very readable as history. The author will often refer to future or past events in a single page, without indication of the precise dates, which makes this a hard book to read for someone not familiar with the October Revolution.
Having said this, a good reason to read this book is that it is beautifully written, and that the author really does get very close to his subject, which is mostly a negative in that he lacks perspective, but does bring the advantage of great liveliness which makes this a very good read. This reminds me of Preston's life of General Franco. Preston hated his subject and was unable utterly to develop any empathy with him, so the book was fairly arid and not insightful. Deutscher has the opposite defect: he gets too close, as perhaps does Nicholas Farrell to Mussolini. The ideal would be like Kershaw's Hitler or Short's Mao: far enough to look the monster in the eye, but not close enough to kiss him.
At this book's end, Trotsky is at the apex of his power, from which he would begin to slip during Lenin's final year. But this is better left to volume II, which I also hope to review.
So read the book, but don't take Deutscher at his word. Complement this with Volkogonov's Trotsky. And with Trotsky's own voluminous writings, which are often very amusing (particularly his biography of Stalin).