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https://en.wikipedia.org/wiki/Permanent_revolution#.27Permanent_revolution.27_according_to_Trotsky
The basic idea of Trotsky's theory[10] is that in Russia the bourgeoisie would not carry out a thorough revolution which would institute political democracy and solve the land question. These measures were assumed to be essential to develop Russia economically. Therefore it was argued the future revolution must be led by the proletariat who would not only carry through the tasks of the Bourgeois Democratic Revolution but would commence a struggle to surpass the bourgeois democratic revolution.
How far the proletariat would be able to travel upon that road would depend upon the further course of events and not upon the designation of the revolution as "Bourgeois Democratic". In this sense the revolution would be made permanent. Trotsky believed that a new workers' state would not be able to hold out against the pressures of a hostile capitalist world unless socialist revolutions quickly took hold in other countries as well. This theory was advanced in opposition to the position held by the Stalinist faction within the Bolshevik Party that "socialism in one country" could be built in the Soviet Union.


Trotsky's theory was developed in opposition to the Social Democratic theory that undeveloped countries must pass through two distinct revolutions. First the Bourgeois Democratic Revolution, which socialists would assist, and at a later stage, the Socialist Revolution with an evolutionary period of capitalist development separating those stages. This is often referred to as the Theory of Stages, the Two Stage Theory or Stagism.

Assuming that Stalin wasn't around to sideline Trotsky and Trotsky, Lenin's heir apparent, was able to replace him upon his death what shape would a Trotskyist USSR take? He was a major proponent of Permanent Revolution and wanting to export the revolution to other countries violently. Assuming Trotsky took over in 1922 what would he have done vis-a-vis Poland, as he wanted to be able to reach Germany to 'liberate' the homeland of Marx and aid the Socialists there in creating an industrial base to help the USSR develop its industry. Peace with Poland had come in March 1921, would Trotsky have started a new war in 1922-23 after coming to power to link up with Germany? Would the German Communists then reflect the ideology of the USSR? German Communists decided after the victory of Stalin in sidelining Trotsky to adopt a more Moscow friendly line and step back from revolution in Germany IOTL, perhaps with a Trotskyist victory they would be more confrontational with the conservatives in Germany in anticipation of Soviet forces moving into Germany?
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