Immurement

is much more than social isolation,
where the line out is the online life,
though to many
the online life can feel that way.

Immurement is also much more
that talking to yourself all day,
because you don't seek company.   

Immurement (from the Latin im- "in" and murus "wall";literally "walling in")
is imprisonment, usually until death,
where a person is placed
in an enclosed space that has no exits. 

This includes where people
have been enclosed
in extremely tight confinement,
such as within a coffin. 

In the days of religion immurement
used to be a form of ritual sacrifice.

Nowadays the most popular form of immurement
is solitary confinement in a maximum security prison
where those so detached are watched with cameras
and have none of the rights that 'ordinary' prisoners have.

Every country in the world has maximum security prisons,
Some prisons are medieval, others are hyper hi-tech.
The effect is the same whichever era the prisoners get.