I believe it is the sentence that starts “Plato became a teacher himself” because Socrates
criticized Sophists which are paid teachers of philosophy.
Answer: Industrial Revolution
Explanation: With the advent of Industrialization and increasing production capacities of industrialized production, there was a need for more workers. Large concentration of production in cities has caused migration of the population from rural to urban areas. A large influx of population into urban centers has caused the spread of cities, i.e. urbanization. Thus migration and urbanization are one of the first results of industrial production.
Liberal Democrats led by David Cameron won a surprise majority and formed the first conservative majority government since 1992