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An Inca quipu is shown, a string with a number of thinner, knotted strings dangling from it.
The Inca had no written language. Instead, they communicated and kept records by means of a system of knots and colored strings called the quipu . Each of these knots and strings possessed a distinct meaning intelligible to those educated in their significance.

The Inca people worshipped their lord who, as a member of an elite ruling class, had absolute authority over every aspect of life. Much like feudal lords in Europe at the time, the ruling class lived off the labor of the peasants, collecting vast wealth that accompanied them as they went, mummified, into the next life. The Inca farmed corn, beans, squash, quinoa (a grain cultivated for its seeds), and the indigenous potato on terraced land they hacked from the steep mountains. Peasants received only one-third of their crops for themselves. The Inca ruler required a third, and a third was set aside in a kind of welfare system for those unable to work. Huge storehouses were filled with food for times of need. Each peasant also worked for the Inca ruler a number of days per month on public works projects, a requirement known as the mita    . For example, peasants constructed rope bridges made of grass to span the mountains above fast-flowing icy rivers. In return, the lord provided laws, protection, and relief in times of famine.

The Inca worshipped the sun god Inti and called gold the “sweat” of the sun. Unlike the Maya and the Aztecs, they rarely practiced human sacrifice and usually offered the gods food, clothing, and coca leaves. In times of dire emergency, however, such as in the aftermath of earthquakes, volcanoes, or crop failure, they resorted to sacrificing prisoners. The ultimate sacrifice was children, who were specially selected and well fed. The Inca believed these children would immediately go to a much better afterlife.

In 1911, the American historian Hiram Bingham uncovered the lost Incan city of Machu Picchu ( [link] ). Located about fifty miles northwest of Cusco, Peru, at an altitude of about 8,000 feet, the city had been built in 1450 and inexplicably abandoned roughly a hundred years later. Scholars believe the city was used for religious ceremonial purposes and housed the priesthood. The architectural beauty of this city is unrivaled. Using only the strength of human labor and no machines, the Inca constructed walls and buildings of polished stones, some weighing over fifty tons, that were fitted together perfectly without the use of mortar. In 1983, UNESCO designated the ruined city a World Heritage Site.

A photograph of Machu Picchu shows the ruins of a complex of buildings with stone walls, stepped terraces green with grass, and a pyramid, with high mountains in the background.
Located in today’s Peru at an altitude of nearly 8,000 feet, Machu Picchu was a ceremonial Incan city built about 1450 CE.

Browse the British Museum’s World Cultures collection to see more examples and descriptions of Incan (as well as Aztec, Mayan, and North American Indian) art.

North american indians

With few exceptions, the North American native cultures were much more widely dispersed than the Mayan, Aztec, and Incan societies, and did not have their population size or organized social structures. Although the cultivation of corn had made its way north, many Indians still practiced hunting and gathering. Horses, first introduced by the Spanish, allowed the Plains Indians to more easily follow and hunt the huge herds of bison. A few societies had evolved into relatively complex forms, but they were already in decline at the time of Christopher Columbus’s arrival.

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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Source:  OpenStax, U.s. history. OpenStax CNX. Jan 12, 2015 Download for free at http://legacy.cnx.org/content/col11740/1.3
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