The document summarizes the 1970s energy crisis which originated from the 1973 Yom Kippur War between Israel and neighboring Arab states. This led to the OPEC oil embargo which caused a negative supply shock and quadrupled oil prices. This first 1970s energy crisis had widespread economic impacts such as high inflation, recession, and changes to energy policy. A second 1979 energy crisis occurred due to the Iranian Revolution which again led to oil price spikes and profits for OPEC. However, OPEC's power declined in the 1980s due to overproduction and increased alternative energy sources in Western countries.