War, trade and piracy would be impossible without cruising ships. And one can rightfully call a cruiser one of the instruments of civilization. Great geographical discoveries and the associated destruction of entire peoples and civilizations would have been impossible without cruisers. Millions of slaves were transported on cruising ships. The enslavement of entire continents was carried out with their help. At the same time, humanity would not be able to understand its world without cruisers. How cruising developed and how this class of ships was formed - the next book in the series tells about this.