Please read :
Slavery: A Fundamental Historical Overview:Slavery: A Fundamental Historical Overview Authored by: Dr. Ahmed Subhy Mansour 25th of August, 2016 Springfield, VA, USA Translated by: Ahmed Fathy ABOUT THIS BOOK: As the Quranic sharia tackles the topic of slaves, some people accuse Islam of endorsing and justifying slavery abolished by the European countries and the USA. These critics of Islam regarding that topic overlook the fact that enslavement has survived until now in different types despite being outlawed, and the West could not really abolish it entirely; rather, the problem has been exacerbated
http://www.ahl-alquran.com/arabic/show_books.php
and also read :
The book: (Women’s Right to Aspire to the Presidency of Any Islamic State)