As far as barbs go, I am fairly certain that I saw barbs build a wonder once. It was in one of my first few games
The Maya, Incas, Aztecs, Olmecs all were very successful civilizations that lived in the jungles of the Americas. There were and still are tribes that live in the Amazon - though they dont attain 'civilization' status of the other civs in this game.
Swamps do exist quite far from oceans. I live 500 miles from the Gulf of Mexico. I have a small swampy area 500 feet from my front yard. Behind my place of employment, there is a couple of square miles of unusable swampland. All you need for a swamp is relatively flat land that doesn't drain real well.
The Maya, Incas, Aztecs, Olmecs all were very successful civilizations that lived in the jungles of the Americas. There were and still are tribes that live in the Amazon - though they dont attain 'civilization' status of the other civs in this game.
Swamps do exist quite far from oceans. I live 500 miles from the Gulf of Mexico. I have a small swampy area 500 feet from my front yard. Behind my place of employment, there is a couple of square miles of unusable swampland. All you need for a swamp is relatively flat land that doesn't drain real well.
(Our beef consumption is down in recent years, as a result of health awareness; I haven't heard we were getting significant amounts from Brazil. Excuse me, my Big Macs are getting cold.
)
) The Mayan civilization was very decentralized and it did disappear, disease is often cited as a possible cause. The Aztec and Incan capitals were in highlands areas, they might have done some building in jungle, but not most of it. The "Angor Wat" Thai civilization was swallowed up by jungle, but it may have been less significant when the civ actually thrived. They too disappeared. American forces on their little neo-imperialist adventures in the Mexican War and a half century later in the Spanish-American War (at their base in south Florida, Cuba and the Phillipines) suffered significant disease losses. So did Napoleon's troops trying to crush the slave rebellion on Hispaniola.
One site claimed explorers Stanley and Livingstone were sick most of the time they were in Africa. The same source claimed "natives" such as the ancient civ in Zimbabwe, had natural immunity that colonists did not. In general, jungle is bad
for most of world history (until disease is conquered anyway
) Even today, malaria and sleeping sickness remain constant problems and diseases like Ebola, AIDS and West Nile virus occasionally spring out of those beautiful "jungles."

. 
I found out after reading some more yesterday that Aztec Tenochtitlan was in fact founded on a lake island with bordering marsh, though I don't know about modern Mexico City, which I still think I heard is on high ground even though it's nearby. (Never been there.)
Comment