Potassium is one of the major electrolytes (together with sodium, chloride and magnesium) that conducts electricity in the human body. It also plays important roles in muscle contraction, nerve impulse transmission, and in maintaining the balance of fluids in the body.
The first modern usage of the specific term social justice is typically attributed to Catholic thinkers from the 1840s, including the Jesuit Luigi Taparelli in CiviltÃ  Cattolica, based on the work of St. Thomas Aquinas.
Even before it was propounded in the Catholic social doctrine, social justice appeared regularly in the history of the Catholic Church: 1  Pope Leo XIII, who studied under Taparelli, published in 1891 the encyclical Rerum novarum (On the Condition of the Working Classes; lit.