How do marx and engels understand the motor of change in human history? how do they view the role of class?

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.

george calvert wanted maryland to be a colony where could live safely. because georgia's founders wanted a colony of small farms rather than large plantations, they originally banned under british law in the 1700s, people who owed money could be