The board is to vote on a sweeping purge of alleged liberal bias in Texas school textbooks in favour of what Dunbar says really matters: a belief in America as a nation chosen by God as a beacon to the world, and free enterprise as the cornerstone of liberty and democracy.

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Several changes include sidelining Thomas Jefferson, who favoured separation of church and state, while introducing a new focus on the "significant contributions" of pro-slavery Confederate leaders during the civil war.

The new curriculum asserts that "the right to keep and bear arms" is an important element of a democratic society. Study of Sir Isaac Newton is dropped in favour of examining scientific advances through military technology.

There is also a suggestion that the anti-communist witch-hunt by Senator Joseph McCarthy in the 1950s may have been justified.