Consider the following Soviet "folk" song:
Дан приказ: ему -- на запад,
Ей -- в другую сторону.
На гражданскую войну.
An order was given: to him, to go west;
To her, in the opposite direction.
The communist youths were leaving
For the civil war.
The song makes clear that the guy and the girl were lovers, maybe even married, family. Yet both were given an "order" to forsake each other. How can that be? Who in any reasonable society has the right to command such obedience?
Well, under socialism, the only employer is the state, and our couple were bureaucrats working for it. The state controls the employees' every move, including their personal lives. There is no option to quit and seek wages elsewhere. To quit is to starve to death, because no production or commerce are permitted outside the state's venues. As a result, like a slave-master who sells the husband to one buyer, and the wife to another, it is entirely normal for the socialist state to break up families, such as by conscripting both the husband and wife, and sending them to fight wars on different fronts.
Here's another one, Катюша (diminutive "Katherine"):
Ох ты, песня, песенка девичья,
Ты лети за ясным солнцем вслед.
И бойцу на дальнем пограничье
От Катюши передай привет.
Пусть он вспомнит девушку простую,
Пусть услышит, как она поет,
Пусть он землю бережет родную,
А любовь Катюша сбережет.
Go on, o this song,
Fly behind the sun;
And say hello from Katyusha
To the soldier guarding the faraway border.
Let him remember the simple girl;
Let him hear her sing;
Let him safeguard the dear homeland;
And Katyusha will safeguard the love.
So, here we have a soldier, all alone, faithfully doing his "duty" in the cold and darkness far away from home. Will he come back home? Nobody knows. His duty may be to guard the border his whole life. Will the lovers ever reunite? Unlikely; he and Katyusha can just as well grow old and die without ever seeing each other. That's not the point, anyway; the point is to apprehend the sacrifices necessary to build socialism. You cannot complain if the socialist central planner assigns you a job (for the welfare of the "people" and greater good) of hard labor in the Arctic; or of guarding night and day an irrelevant piece of land for 25 years, until your health and spirit are irreparably ruined. Your own life and personal projects and commitments pale in comparison before your devotion to the state and to the grand cause of communism. You are expected to sacrifice everything for their sake.
It is arguable that there is little difference between socialism and the system barely removed from savage autarky: a slave society.