The traits exhibited by the olmec civilization share with the river civilisation in mesopotomia ,egypt and india was that they built the writing system
What was Olmec civilisation?
The Olmecs were the earliest known major Mesoamerican civilization.
Following a progressive development in Soconusco, they occupied the tropical lowlands of the modern-day Mexican states of Veracruz and Tabasco.
The Olmecs flourished during Mesoamerica's formative period, early Olmec culture had emerged, centered on the San Lorenzo Tenochtitlán
They were the first Mesoamerican civilization, and laid many of the foundations for the civilizations that followed.
Among other "firsts", the Olmec appeared to practice ritual bloodletting and played the Mesoamerican ballgame, hallmarks of nearly all subsequent Mesoamerican societies.
The aspect of the Olmecs most familiar now is their artwork, particularly the aptly named "colossal heads".
The Olmec civilization was first defined through artifacts which collectors purchased on the pre-Columbian art market in the late 19th century and early 20th centuries.
World War I was so deadly because all of the new weapons that were invented. New technology that was being invented such as machine guns and mustard gas made war deadlier than every war before.
