What is meant by the statement that history gives evidence of both the enduring and the changing?

According to marx, which of the following would be the main characteristic of communism? a. a community which work was shared and property was owned in common b. a classless society in which wealth and power were equally shared c. a society in which the economy function without government interference d. an economy in which private individuals owned the means of production.

Match each model with its name and the name of the scientist who created it.

Were african-americans allowed to serve in the military in wwi?