Simply, the working conditions were terrible during the Industrial Revolution. As factories were being built, businesses were in need of workers. With a long line of people willing to work, employers could set wages as low as they wanted because people were willing to do work as long as they got paid.
With television and the internet, people can follow the news, recent events, happenings, campaigns, etc. pretty much wherever they are and from far distances, which means they can be far from each other a well.
With modern technological advances, the information can reach a wide array of people and places that<u> do not have to be geographically connected, not with the source of the information, nor with other consumers.</u>
Answer: The immigration of Irish and German to the US during 1810 to be precise was a total of 7.5million people, which were basically more than the population of the US at that time. This people emigrated due to civil unrest, lack of work and severe economic system in their various countries and at the time they came to the US, the Burgeoning companies were able to absorb all that required work. So they work building railroad and constructing canals and they were also involved in every labor intensive work during that period. So therefore, most of the early development of US was made by both the Irish and German immigrant.