History of interest rates
A chart showing the history of interest rates over the last few centuries shows an interesting pattern — low hills and valleys with a generally downward tendency. During and immediately after World War I, interest rates form what looks like a low mountain range. Then with the arrival of the Great Depression of the 1930s, rates sink into a deep valley. Unlike during World War I, interest rates remain near Depression lows during World War II but start to rise slowly with some wiggles through the end of the 1960s.
But during the 1970s, interest rates suddenly spike upward, without precedent in the history of capitalist production. It is as though after riding through gently rolling country for several hundred years of capitalist history, you suddenly run into the Himalaya mountain range. Then, beginning in the early 1980s, interest rates start to fall into a deep valley, reaching all-time lows in the wake of the 2007-09 Great Recession. Clearly something dramatic occurred in the last half of the 20th century.