Life expectancy, also called life expectancy, is the average number of years that a country's population can expect to live, if the same living conditions experienced at birth are maintained. Life expectancy is closely related to the quality of life that a country has, since factors such as education, health, social assistance, basic sanitation, safety at work, violence rates, absence or presence of wars and internal conflicts influence on directly.
Well at first people named things for how they looked, for example, the heart has a heartlike shape. Eventually scientists started using Greek and Latin roots and such in names to prevent confusion.
He was an author so he contributed by writing books to acknowledge the age of enlightment of literature and... other things!
The farming market dried up