How are the themes of “we wear the mask” and "a man said to the universe" similar? both show how humans can be in the face of external forces. both state that large, powerful forces such as society are illusions. both illustrate the environment’s indifference to humankind. both demonstrate why people must hide their suffering in order to survive?

The answer is: both show how humans can be helpless in the face of external forces

"we wear a mask" describes the painful experience of African Americans during the time of slavery (in this context, the slave traders and owners are the external forces)/

"A man said to the universe"  describes how helpless a man would be in the face of potential disasters and problems that can be caused by the universe.

answer; the federal reserve system;

b. the american revolution