The term mouse fly is kind of a contradiction and one of the types of flies that brings the word fly in fly fishing almost as far away from something flying as possible - still surpassed by shrimp flies not to mention crab flies, but anyway...
One of the reasons Britain became rich was because the Industrial Revolution (factories and such) got off the ground there sooner. Britain had a large navy, and many colonies in other parts of the world, such as India, and Rhodesia.
Making the world better, one answer at a time. The Industrial Revolution put people out of jobs because machines were made that did the jobs once done by humans and/or animals. In the textile industry machines were eventually made to do the job of weaving cloths and other materials.