John O'Farrell: A movement called the Silver Ring Thing are promoting the idea that young people should not have sexual relations before marriage, which is an inversion of the usual British tradition of abstaining from sex after marriage.
In the US, women are regularly prosecuted for endangering their unborn children - some have even been convicted of murder. Now women's groups are fighting back. Diane Taylor reports.
The Nazis were by no means the only advocates of racial purification. In this extract from his extraordinary new book, Edwin Black describes how Adolf Hitler's race hatred was underpinned by the work of American eugenicists.