For some of Barack Obama's most ardent supporters, his resounding victory represented the first sign of redemption for a wretched, guilty nation with a 400-year history of oppression.

Filmmaker Michael Moore, for instance, considered election night "a stunning, whopping landslide of hope in a time of deep despair. In a nation that was founded on genocide and then built on the backs of slaves, it was an unexpected moment, shocking in its simplicity."

Actually, Mr. Moore's summary of America's origins is a wholly expected distortion, shocking in its mendacity.

Like so many other revered figures in the worlds of entertainment and academia, the portly provocateur thoughtlessly recycles the darkest assumptions about the generous nation that provides his privileged, prosperous life.

My new book, "The 10 Big Lies About America," represents an aggressive effort to correct the ugly smears that play an increasingly prominent (and often unchallenged) role in our public discourse.

Big Lie No. 1, for instance, concerns the ubiquitous notion that the nation's founders and builders followed a policy of "genocide" toward Native Americans.

In truth, disease caused 95% of the deaths that ravaged native populations of North America following European contact. Despite lurid (but historically baseless) claims of massive infection brought about by "smallpox blankets," even the deadliest germs displayed no consciously hostile agenda.

In fact, intermarriage (including frequent intermarriage with African-Americans, slaves and free) and assimilation caused more Indian "losses" than all occasional massacres by governmental and irregular forces — incidents invariably condemned by federal authorities, never sponsored by them.

My book's Lie No. 2 precisely anticipates Moore's claim that America was "built on the backs of slaves," suggesting that our wealth and prosperity came chiefly through the stolen labor of kidnapped Africans.

While slavery represented an undeniable horror in our nation's early history, the slave population never exceeded 20% of the national total (amounting to 12% at the time of the Civil War). This means that at least 80% of the work force remained free laborers.

The claim that our forefathers built America "on the backs of slaves" rests on the idiotic idea that involuntary servitude proved vastly more productive than free labor. In fact, the states dominated by the slave economy counted as the poorest, least developed in the union — providing the North with crushing economic superiority that brought victory in the War Between the States.

Of more than 20 million Africans taken from their homes in chains, at most 3% ever made their way to the territory of the United States (or the British colonies preceding our nation). Americans played no part in establishing the once-universal institution of slavery but played a leading, outsize role in bringing about its abolition.

Other lies about America's past badly distort current debates over public policy. It's not true, for instance, that governmental activism provides a necessary remedy for periodic economic downturns (Big Lie No. 6). Continued...