Inflation is always and everywhere a monetary phenomenon.

Economists
Milton Friedman
Born in 1912 in New York to Hungarian Jewish immigrants, Friedman rose from poverty to champion free markets. As monetarism's architect, he challenged Keynesian orthodoxy and reshaped monetary policy. Nobel 1976.
View this figure's profile
Source: A Monetary History of the United States, 1867-1960Verified
Milton Friedman's Other Quotes
There is no such thing as a free lunch.
A society that puts equality before freedom will get neither. A society that puts freedom before equality will get a high degree of both.
The great virtue of a free market system is that it does not care what color people are; it does not care what their religion is; it only cares whether they can produce something you want to buy.
Nothing is so permanent as a temporary government program.