The Fourth Amendment protects citizens from unlawful searches and seizures.
They actually played a pretty important role in early civilizations. For one, building a major urban civilization takes a lot of work. Slaves could be used for building projects to enlarge the city and its defenses, for agricultural labor to ensure that the people of the city could eat, or as domestic assistants to kings, lords, and shop-owners.
In the 19th century, the poor represented a threat to the social order, so the government created laws to regulate them and provide them with some kind of care, but the administration and social work was carried out mostly by citizens who organized themselves to bring social aid to the poor and more disadvantaged, as well as creating shelters for poor people, attending them with education, health and legal assistance, this was how the movement was adding more volunteers to social activism to help their neighborhoods with the rescue of people from prostitución, diseases or any extreme situation they were dealing with.
The crusades introduced Europe to the works of Middle Eastern scholars, philosophers, and doctors. Richard the Lion-heart, King of England and one of the most famous Crusader Kings, had an Arab physician.<span />
