“The present, which, as a model of Messianic time, comprises the entire history of mankind in an enormous abridgment, coincides with the stature which the history of mankind has in the universe.”

"Credo" (1991); also in Greetings, Carbon-Based Bipeds! : Collected Essays, 1934-1998 (1999), p. 360
1990s

Durch die Künstler wird die Menschheit ein Individuum, indem sie Vor welt und Nachwelt in der Gegenwart verknüpfen. Sie sind das höhere Seelenorgan, wo die Lebensgeister der ganzen 15 äussern Menschheit zusammentreffen und in welchem die innere zunächst wirkt.
“Selected Ideas (1799-1800)”, Dialogue on Poetry and Literary Aphorisms, Ernst Behler and Roman Struc, trans. (Pennsylvania University Press:1968) #64 [cf. Heidegger]

Letter to Thomas Jefferson (3 September 1816), published in Adams-Jefferson Letters: The Complete Correspondence Between Thomas Jefferson and Abigail and John Adams http://books.google.com/books?vid=ISBN0807842303&id=SzSWYPOz6M8C&pg=PP1&lpg=PP1&ots=kTAZL3ImRq&dq=%22Adams-Jefferson+letters%22&sig=tVGzBe0XVhXaF2p0FQLGy4GK6bk#PRA2-PR17,M1 (UNC Press, 1988), p. 488
1810s
Context: I almost shudder at the thought of alluding to the most fatal example of the abuses of grief which the history of mankind has preserved — the Cross. Consider what calamities that engine of grief has produced! With the rational respect that is due to it, knavish priests have added prostitutions of it, that fill or might fill the blackest and bloodiest pages of human history.

Vol 2, Ch. 25 "Has History any Meaning?" Variant: There is no history of mankind, there are only many histories of all kinds of aspects of human life. And one of these is the history of political power. This is elevated into the history of the world.
The Open Society and Its Enemies (1945)
Context: There is no history of mankind, there is only an indefinite number of histories of all kinds of aspects of human life. And one of these is the history of political power. This is elevated into the history of the world. But this, I hold, is an offence against every decent conception of mankind. It is hardly better than to treat the history of embezzlement or of robbery or of poisoning as the history of mankind. For the history of power politics is nothing but the history of international crime and mass murder (including it is true, some of the attempts to suppress them). This history is taught in schools, and some of the greatest criminals are extolled as heroes.

Source: Vestiges of the Natural History of Creation (1844), p. 310

Note-Book of Anton Chekhov (1921)

Eighth Thesis
Idea for a Universal History from a Cosmopolitan Point of View (1784)

Source: Count Magnus Fredrik Ferdinand Bjornstjerna in: The Theogony of the Hindoos with Their System of Philosophy and Cosmogony by Count M. Björnstjerna https://books.google.co.in/books?id=mHNK92IkdUkC&pg=PA85, Murray, 1844 , p. 85.

On prosecutions against him, as quoted in "Silvio Berlusconi: I am inferior to no one in history" in The Guardian (10 October 2009) http://www.guardian.co.uk/world/2009/oct/09/berlusconi-boast-best-in-history
2009