“The dominant form of government in the world today is dictatorship. Further throughout history, dictatorship has been the commonest form of government, indeed, for much of history the only form of government in the world.”

Source: Strong democracy: Participatory politics for a new age (2003), p. 3

As quoted in Eisenhower and the Suez Crisis of 1956 (1995) by Cole C. Kingseed, p. 27
1960s

Source: The Moral Judgment of the Child (1932), Ch. 2 : Adult Constraint and Moral Realism <!-- p. 95 -->
Context: The discussion of the game of marbles seems to have led us into rather deep waters. But in the eyes of children the history of the game of marbles has quite as much importance as the history of religion or of forms of government. It Is a history, moreover, that is magnificently spontaneous; and it was therefore perhaps not entirely useless to seek to throw light on the child's judgment of moral value by a preliminary study of the social behaviour of children amongst themselves.

1800s, First Inaugural Address (1801)
Context: Sometimes it is said that man can not be trusted with the government of himself. Can he, then, be trusted with the government of others? Or have we found angels in the forms of kings to govern him? Let history answer this question.

Not found in Jefferson's writings. http://www.tcfrank.com/essays/Check_It_Yourself
Misattributed

The Tyrant Next Time (November 7, 2019)

Revolution by Number

Interview in El Mercurio (1981)
1980s and later
Context: Well, I would say that, as long-term institutions, I am totally against dictatorships. But a dictatorship may be a necessary system for a transitional period. At times it is necessary for a country to have, for a time, some form or other of dictatorial power. As you will understand, it is possible for a dictator to govern in a liberal way. And it is also possible for a democracy to govern with a total lack of liberalism. Personally I prefer a liberal dictator to democratic government lacking liberalism. My personal impression — and this is valid for South America — is that in Chile, for example, we will witness a transition from a dictatorial government to a liberal government. And during this transition it may be necessary to maintain certain dictatorial powers, not as something permanent, but as a temporary arrangement.

1800s, First Inaugural Address (1801)