It is commonly held that Hazrat Adam(as), who lived about 6,000 years ago, was the first man on Earth. However, this view is not supported by the Holy Quran, as a close study of the relevant verses reveals.
The Holy Quran is a timeless book, no portion of which is subject to abrogation. It is a scripture designed to be relevant in all times and for all cultures.
The injunction of Hijab is not just recommendatory. Nor is the concept of Purdah an innovative practice. Those who observe Hijab abide by the fundamental commandment of the Holy Quran.