How would a society go from a purely communist system to capitalism, both with and separately without conflict?
You have asked an interesting (and open-ended) question to begin with. An issue with answering questions regarding capital and Socialism is that they get lost in the political thicket, although given the nature of the question, politics is inevitable at some point. No matter how much I appreciate the 'ark ship' narrative, I would like to answer without delving into it. [Opinion alert: The following piece will be subjective.]