Answer:
because they were treated like pets back then and they were useful as maids or servants.
Explanation:
Islam spread through military conquest, trade, pilgrimage, and missionaries. Arab Muslim forces conquered vast territories and built imperial structures over time.
It's unjust to treat anyone differently for irrelevant reasons generally.
Especially when men and women work equally hard and produce the same effects it is unjust to treat them differently due to their biological differences which might even not influence their work: there is then also no good reason to treat them differently.
The USSR is a communist area while the US is a democracy
