What were the positive and negative results that this historian argues is the legacy of the Crusades?

The historian argues that the legacy of the Crusades is marked by both positive and negative results. On the positive side, the Crusades facilitated cultural exchange between the East and West, leading to advancements in knowledge, trade, and the spread of new ideas. Conversely, the negative outcomes include heightened religious intolerance, lasting animosities between Christians and Muslims, and the establishment of a legacy of violence that influenced future conflicts. Overall, the Crusades left a complex legacy that shaped both medieval and modern interactions across cultures.