What did the Olmec carve into their giant stone heads?

The Olmec are probably best known for the statues they carved: 20 ton stone heads, quarried and carved to commemorate their rulers. The name Olmec is an Aztec word meaning the rubber people; the Olmec made and traded rubber throughout Mesoamerica.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.