[T]he jury that in 1968 convicted the pediatrician Dr. Benjamin Spock and others protesting the Vietnam War of conspiring to violate the Military Service Act of 1967 by advocating the destruction of draft cards […] was devoid of women, largely because the venire from which this jury was formed contained only 9% women. A subsequent analysis of the distribution of the proportion of women in the venires of all the judges in the district showed that the venires for one judge – the Spock trial judge – had a distribution centered about an unusually low proportion of women.