Watch A Matter of Life and Death: History of Hygiene (2021) : Full Movie Online Free Hygienic habits are as old as the various human civilizations; but each era establishes its own customs: whether private or public, everywhere and at all times, methods of personal cleanliness have depended on cultural conventions, religious morals, political ideologies and economic interests; because the control of basic hygiene has also been and is one more tool in the infinite exercise of power over the masses.