Class War is:
Employer vs. Employee
Master vs. Slave
Lord vs. Serf

Those who rule against those who are ruled.
Two classes with opposite interests.
What is profitable for the owner is increased exploitation of the worker.
Higher wages for the worker is reduced profits for the owner.

The two classes, by definition, can not coexist harmoniously.

The world belongs to all, workers must take it back from the few.