Khmer Empire
India and China have influenced Southeast Asia
The greatest threat to the kingdoms was from defeat in war. Most of the early kingdoms did not survive, as those that did survive destroyed the others.
Japan was not a unified country in its early days. There were multiple kingdoms whose enemies were the other kingdoms.
Many early African kingdoms collapsed because of inter-tribal fighting over leadership.
Tobacco.
The ultimate goal of the early Portuguese explorers was to find a sea route to Asia for trade in spices and other valuable goods. They sought to establish trade connections with Asian kingdoms and bypass the overland routes controlled by the Ottomans.
The saying is a variation on "Treason doth never prosper, what's the reason? For if it prosper, none dare call it treason." from "Epigrams" by Sir John Harington of the early 17th century.
through trade
They had no written laws.
Prosper of Aquitaine was a Christian writer known for his theological works and poetry. Some of his notable works include the "Epitoma Chronicon" and his "Carmen de Ingratis." He was also involved in theological controversies of his time.
by the form of democracy