In terms of theory, Trotskyism is a form of revisionism. It tries to change aspects of Marxism-Leninism and replace them with Trotskyism. However, ‘orthodox trotskyists’ (the original type of trotskyists) also agree with Marxism-Leninism on many issues.
Trotsky created only a few new ‘theories’:
- the idea that Socialism can only be built if it happens in many Western industrial countries at the same time.
- the idea that the USSR was a “degenerated stalinist state”
- the idea that workers cannot ally with anti-fascist bourgeoisie or anti-imperialist bourgeoisie
I think all of those ideas are wrong. But like I said, its possible to find some common ground with some Trotskyists.
In terms of its historical role, Trotskyism was anti-communist. Its main goal was to attack and criticize Marxist-Leninist communist parties in all countries, and create propaganda against the Soviet Union. They also collaborated with enemies of the Soviet Union and enemies of communist parties. Sometimes they secretly allied with capitalists and fascists against “stalinist communists”. That is why it was impossible historically for Trotskyists to unite with Marxist-Leninists. Today the situation is a little bit different, as the Soviet Union and “stalinism” no longer exists.
Modern Trotskyists still attack the legacy of the USSR and the legacy of communism. That is a problem. They also advocate incorrect theories. Many (if not most) modern Trotskyist organizations have betrayed orthodox Trotskyism and have accepted worse kinds of revisionist ideas. Some of them defend US imperialism as “spreading democracy” and “overthrowing dictatorships”. Some of them advocate reformism and some of them are basically liberals. But its possible to find some orthodox Trotskyists who can be reasonable, and can agree with Marxist-Leninists on many things. They probably won’t agree about historical events, but they might agree with our modern day tactics and goals.