Karl Marx (1818-1883) explained historical change by using and adapting a theory that was first developed by Georg Wilhelm Friedrich Hegel (1770 - 1831). According to Hegel's theory, in any period of history there is a conflict between contrary and opposing forces. For Marx, although not for Hegel, these opposing forces were exclusively economic classes.
For Marx, in any period of history up to and including the Industrial Revolution and modern capitalism, there has always been a dominant economic class, which has exploited a lower economic class, this situation is stressed in capitalism…