The scientist Galen advanced understanding of Anatomy
Astronomy
Geometry
Archectecure

Anatomy

Explanation:

Galen contribute tremendously to the understanding of the respiratory system, blood and the circulatory system.

peace keepers

idealism to be spread

riches kept

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.