Civilizations connected through trade first via trading tools with other nearby communities then it evolved into trading more goods such as foods crops and weapons. Then with boats this allowed technology and customs to travel for example Egyptian sculptures influencing Greek art work and the silk road. This helped humanity since a example of isolation was japan until the Miji Restoration. Humanity needs trade in order to communicate and get things they cannot make in their region of the world.
Urbanization. As industrial innovations took off, more factory jobs were available, more people moved to dense cities, and urban construction grew.
The wealthier the companies got the more greedy they were and the more money they pulled or took off of the laborers pay check I think hope this helps..
