What are some causes of a sore and red tongue? A: Several things may cause a sore tongue including trauma such as biting or burning the tongue, smoking cigarettes, or having a canker sore on the tongue, ac... Full Answer >
Lower middle class. In developed nations across the world, the lower middle class is a sub-division of the greater middle class. Universally the term refers to the group of middle class households or individuals who have not attained the status of the upper middle class associated with the higher realms of the middle class, hence the name. Contents.
There is no standard definition of the upper middle class. Many researchers have defined the group as households or families with incomes in the top 20%, excluding the top 1% or 2%.