In the extreme northwestern part of the country, there are limited outcrops of limestone rock associated with the older nonvolcanic structures of Honduras.Lempa, which enters El Salvador from Guatemala in the northwestern corner of the country and flows eastward for 80 miles (130 km) across the interior plain to form part of the border with Honduras before turning sharply south to run 65 miles (105 km) through the central highlands and across the coastal plain to its mouth on the Pacific.Furthermore, the many wars and political revolts in El Salvador impeded its economic and social growth.
This was one of the first signs of inequality brought to El Salvador by the Oligarchy.
In the seventeenth century, the demand for cacao dropped.
The mixing of the Pipil and other tribes with European settlers is reflected in the modern-day ethnic composition of the country.
El Salvadorans are known for their industriousness, and the country has produced several internationally acclaimed artists, including poet Roque Dalton.
North of the central highlands, and parallel to them, a broad interior plain drained by the Lempa River is situated at elevations between 1,300 and 2,000 feet (400 and 610 metres).
Intermittently broken by ancient dormant volcanic structures and adversely affected by poor drainage and high soil acidities, this interior plain has provided a less-attractive environment for human habitation.
El Salvador is bounded by Honduras to the north and east, by the Pacific Ocean to the south, and by Guatemala to the northwest.
Its territory is situated wholly on the western side of the isthmus, and it is therefore the only Central American country that lacks a Caribbean coast.
By the end of the 20th century, however, the service sector had come to dominate the economy. From the late 1970s to the early 1990s, El Salvador was the focus of international attention, owing to its civil war and to external involvement in its internal conflicts.
The war, which pitted a militarily and politically capable left-wing insurgency against the U.