I believe that was the Crusades.
Answer:
Forced labor is different from sub-standard or exploitative working conditions found in some factories and employment opportunities worldwide. Victims of unfair or low wages - like those in sweatshops - are not enslaved because they do not work under the threat of a penalty or without volunteering their employment.
The scientific method <em>revolutionized the study of human society</em> during the Gilded Age and onward; sparking curiosity within the members of society, and encouraged people to <em>gain knowledge</em>, discover and investigate; causing them to question old credence, and starting to prove them wrong, thus <em>leading to technological advances</em>, and large scale production methods, the inception of intellectual movements and favored <em>drastic reforms in education</em>, thus bringing opportunities to other scope of the population, because racial, ethnic, religious, gender and socioeconomic inequalities still abounded, so it also inspired some reformers to address those inequities in some form.
Brokers began to give money to average Americans to buy stock "on the margin". This was the first use of credit in the United States. Essentially, Americans were borrowing money to try to gain more money than they borrowed from the stock market.
