If it is true that...

Improved means of communication created by modern industry help in centralizing numerous local struggles into one national struggle between classes

Then it must be true that...

Every class struggle is a political struggle

If it is true that...

Workers form combinations against the bourgeois to keep up the rate of wages

and

Improved means of communication created by modern industry help in centralizing numerous local struggles into one national struggle between classes

Then it must be true that...

Every class struggle is a political struggle

If it is true that...

With its birth, the proletariat begins its struggle with the bourgeoisie

and

Improved means of communication created by modern industry help in centralizing numerous local struggles into one national struggle between classes

Then it must be true that...

Every class struggle is a political struggle