"Those markets inevitably devolve into rule by force. The havenots are at the mercy of the haves."

This is entirely false. Free trade is not free trade if the deal does not benefit both parties. Like I said in a previous post a few months ago;

"All trades conducted in a free market system will only occur if the trade is in the best interests of both parties. If both involved in the trade are not profiting out of it, the trade will not occur."

There will be wealth inequality, guaranteed, however the rich person still relies on the poor for trades and services, and the poor still rely on the rich for trades and services. If force is applied by either party, it is not capitalism, it is not free.

Also, how have communists come to relate imperialism and trade by force with capitalism? Just something I don't understand. They are completely incompatible.