Petroleum (crude oil) is a naturally occurring, flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth’s surface. For over 5000 years, this has been utilized by humans.
Oil in general has been used since early human history to keep fires ablaze, and also for warfare, or any organized, armed, and often a “prolonged conflict” that is carried on between states, nations, or other parties typified by extreme aggression, societal disruption, and usually high mortality.

Its importance in the world economy evolved slowly, with whale oil used for lighting into the 19th century. Whale oil is obtained from the blubber of various species of whales, particularly the three species of right whale (“Eubalaena japonica,” “E. glacialis,” and “E. australis”) and the bowhead whale prior to the modern era, as well as several other species of baleen whale. Wood and coal was also used for heating and cooking into the 20th century.

The Industrial Revolution generated an increasing need for energy which was fueled mainly by coal, with other sources including whale oil. The Industrial Revolution was a period from 1750 to 1850 where changes in agriculture, manufacturing, mining, transportation, and technology had a profound effect on the social, economic and cultural conditions of the times. However, it was discovered that kerosene could be extracted from crude oil and used as a light and heating fuel.  

Petroleum was in great demand, and by the twentieth century had become the most valuable commodity traded in the world market.


See: Ka Band