You like chocolate? Vanilla? Maize? Tomatoes? Avocado? Potatoes? Pineapple? Pumpkin? Turkey? Chiles? Quinoa? These are just some of the foods the Americas contributed to the world.

They domesticated corn, potatoes, tomatoes, chocolate, vanilla, and numerous other crops. In fact it is believed that they had more domesticated plants for food and medicine than Europe did.

They also had many forms of culture. The south American groups often had building skills comparable or more advanced than Europe including cities larger than any in Europe, the largest Pyramids in the world and far more Pyramids than exist in Egypt. They had pictographic languages and an understanding of astronomy and mathematics that allowed them to produce calendars that are more precise than our modern ones.

So to say that they had no culture and no contributions to the world is very misinformed.

Huh ?

Corn/maize feeds multitudes world-wide and the humble potato enabled food-short countries like Germany to feed it's people. The next step after feeding it's people ? The Industrial Revolution for Germany and the rest of the World.

At the beginning of the 20th century, Germany consistently won Nobel Prize after prize in technology & science.

So yes, indirectly Native Americans contributed to the World.

You and your friend should check out this thred (the top response here is really insightful and informative), as well as this thread and this one.

You should also read books like James Ronda's Lewis and Clark Among the Indians, Hampton Sides' Blood and Thunder, Richard White's The Middle Ground, and Pekka Hamalainen's Comanche Empire to get a better understanding of the diversity and complexity, as well as the political and military power, of Native cultures - there are more than 560 federally recognized tribes, and while some of them are similar, no two are completely alike. As for them "waiting to be conquered by Europeans," tell that to the Euro-American settlers in New Mexico, Arizona, Colorado, Texas, Utah, Kansas, Montana, Wyoming, North and South Dakota and elsewhere who lived in fear of the next raid by the Navajo, Apache, Comanche, Ute, Cheyenne, Arapaho, Lakota, Kiowa, Blackfoot, and others.

While it has already been pointed the cultigens that the civilizations of the Americas contributed to the rest of the world, I want to tell you a little story about Native Americans, the birth of the United States and democracy. While Europeans were way too busy fighting against each other trying to impose their wills, the little known Iroquois Confederacy of Nations was capable of bringing together vast amounts of people under a political system we often attribute to the greeks (yes I am talking about democracy here). Washington and Franklin, while it is not often acknowledge, were influenced by the confederacy and their processes and took those ideas with them to the constitutional convention. So, in a sense, democracy and some of the major democratic processes outlined in the constitution, yes the constitution of the Unites States, are rather a product of the Iroquois Confederacy. However, it took 200 year for this to be acknowledge by the Congress, when they passed the Concurrent Resolution 331. I want to believe that you only posted this question as a joke to infuriate people.