It still causes tension between Jews, Christians, and Muslims.
racist people
stuff
war
The real negative effects of biotechnology are really the potential negative effects since many of the presumed problems have not actually occurred. Some real and potentially real problems include the effects of genetically modified organisms, antibiotic resistance and ethics surrounding many treatments and therapies, vis-a-vie risk/benefit.
The great crusades were caused by religious beliefs and ended up killing millions of people.
There was a lot of killing during the Crusades as the crusaders often pillaged the towns and villages they passed if they didn't offer food and hospitality (which could have been because they were already struggling to survive). Also many children died in the Children's crusade.
some of the affects were that the crusades were disliked by the people of England. they made people poor.
the Crusades benefited Europe in a number of ways. For one thing, the exchange that occurred during the Crusades facilitated the spread of Islamic math and science. This exposed Europeans to improvements in navigation techniques. These advancements, in turn, helped to usher in Europe's Age of Exploration and led to nearly five centuries of European cultural and economic dominance.
Because of the Crusades there is to this day tension between Christians, Jews, and Muslims; especially in the Middle East. Another effects: formidable costs, crimes, destruction, murders, robberies, hate, wars. Crusades were criminal actions of the damned catholics from the Western Europe.
Tolerance for other people
blah blah blah.
The social effects of the Crusades upon the social life of the Western nations were marked & important. The Crusades afforded an opportunity for romantic adventure. The Crusades were therefore one of the principal fostering influences of chivalry. Contact with the culture of the East provided a general refining influence.