Communism is pure evil at its worst because it robs people of all individuality and inititiave.
It rewards laziness and kills the human spirit.
Communism only and always results in shared poverty since the productive amongst us are punished and lose all incentive to produce better and more goods that people need an want.
Communism also only exists by tyranny and the threat of summary execution like in China or the old USSR since no dissent is ever permitted, unlike in the USA.
I think, as Karl said, that communism is an unavoidable culmination of the progress of human/economic history.
Have you been around
Have you done your share of coming down
On different things that people do
Have you been aware
You got brothers and sisters who care
About what's gonna happen to you
In a year from now...
Maybe I'll be there to shake your hand
Maybe I'll be there to share the land
That they'll be giving away
When we all live together.
--The Guess Who
Forward in brotherhood, From each according to his ability, to each according to his need ...