Which 17th-century value is most clearly shown in Robinson Crusoe

Robinson Crusoe is the shortened version of the title of Daniel Defoe's novel ... The time is the second half of the seventeenth century, from 1651 to 1694 ... Crusoe is a capitalist who believes in middle-class values ... The next day, Crusoe returns to the ship for more supplies: nails, spikes, a grindstone, bullets, muskets, ...