Without the ability to read ancient Chinese and Maya text, we would be limited to archeological findings and guesses made based on them. The fact, that we can read ancient texts, let us know for example:
the names and times of rule of many rulers,
the religious practices
some events from the past
some cultural and technological inventions such as their knowledge of astronomy
the social composition of the society
Our knowledge of urban live comes from the description of customs and occational information about who lived where and how much was paid for what services
The Incas were highly advanced in terms of mathematics and
astronomy. Their unique architecture of
massive stonework is made possible by their great understanding of mathematics.
Inca structures where made of precisely hewn stones that fit together so
perfectly without use of mortar. They also understood astronomy and made very
accurate calendars.
The election of 1876 directly contributed to the end of reconstruction in the United States.
Nominal GDP is the market value of goods and services produced in an economy undigested for inflammation. Real GDP is nominal GDP, adjusted to reflect changed in real output. The main difference between nominal GDP in real GDP is the adjustment for implantation since nominal GDP is calculated using current prices it does not require any adjustments for inflation.