does any one figured out why billions of Mulsims fasted from food and water during Ramadan month?

well:this questions is for every person whose mind is working probably we all know that billions of muslims went out to hunger and thristy during ramadan as well as reciting the holy quran with weak energy,so this deed is same thing which Allah obligated on muslims and the past nations,and most of the wesdom behind this only the creator knows it.but we know a litte of it,so tell me the measure of you anwer to wards this questions,ethier talkin about it in religios idea or scientific ideology?