Achievement Quote by Ivor Grattan-Guinness

I am coming more and more to the conviction that the necessity of our geometry cannot be demonstrated, at least neither by, nor for,…

— Carl Friedrich Gauss

Kepler's discovery would not have been possible without the doctrine of conics. Now contemporaries of Kepler-such penetrating minds as Descartes and Pascal-were abandoning the…

— Charles Sanders Peirce

The orthodox doctrines of economics which were dominant in the last quarter of the nineteenth century had a clear message. They supported laisser faire,…

— Joan Robinson

“Although advertising began in the late nineteenth century with the development of the first branded products, its true explosion came in the 1920s, when…

— Robert J. Gordon

“Only in the mid-nineteenth century, after the growth of industrial cities and a rash of urban riots—after dread of the so-called dangerous classes surpassed…

— David Grann

For every nineteenth-century middle-class family that protected its wife and child within the family circle, there was an Irish ora German girl scrubbing floors…

— Stephanie Coontz

Love in modern times has been the tailor's best friend. Every suitor of the nineteenth century spends more than his spare cash on personal…

— George Augustus Henry Sala

“Because it is written by a nineteenth-century American, and because of its closeness to the twentieth century, The Portrait of a Lady foregoes Victorian…

— Ian Gregor

“From a long view of the history of mankind-seen from, say, ten thousand years from now-there can be little doubt that the most significant…

— Richard Feynman

To build a twenty-first-century economy, America must revive a nineteenth-century habit--investing in the common, national economic resources that enable every person and every firm…

— William J. Clinton

“As such, the usual pattern of interaction between a critical juncture and existing institutional differences leading to further institutional and economic divergence played out…

— Daron Acemoğlu

“One third of all Scots in the mid-nineteenth century moved from one county to another”

— Thomas Sowell