The major difficulties presented by industrialization were social ones. As industrialization changed the way that people worked, society changed as well. That kind of huge and sudden change can put a strain on any society.
For example, in the times before industrialization, people generally worked for themselves. They were able to be their own bosses -- to decide when they would work and how hard they would work. The work was often done at home, with their families. That was how things had been done for a long time.
Now industrialization comes along and that all changes. All of a sudden, people are working outside their homes and are having to work when someone else tells them to. This makes people feel very upset and unhappy because they feel like they are less important and less independent than they used to be. When feelings like that are very widespread, they can lead to significant political and social unrest in a society.