For butler, is a kind of persistent impersonation that passes as the real.

Gender

For Butler, gender is a kind of persistent impersonation that passes as the real. Gender refers to the role of a male or female in society, known as a gender role, or an individual's concept of themselves, or gender identity. Occasionally, an individual’s genetically assigned sex does not correspond with their gender identity. These individuals might refer to themselves as transgender, non-binary, or gender-nonconforming.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.