Final answer:
Brutus is not very emotional upon hearing of Portia's death because Roman society valued men's stoicism and emotional control.
Step-by-step explanation:
When Brutus receives confirmation of Portia's death, he is not very emotional because the social norms and expectations of ancient Rome placed a strong emphasis on men suppressing their emotions and showing strength and stoicism.
In Roman society, it was considered honorable for men to control their emotions, especially in the face of adversity.
This was particularly true for men of high status like Brutus, who were expected to embody the virtues of self-control and rationality.