[6][2] Ruth Anna emigrated to the United States in 1948, aged 21, where she was finally reunited with her parents in Los Angeles.

[2][1] Her father, having been a well-known Communist in Germany and thus fearful of deportation from the US, had changed his name to 'Martin Hall'.

[1][7][4] And Ruth went by this surname as a young adult though, as she would tell her family, she did not legally change her birth name before marriage.

"[8] And she would go on to gain a Ph.D. in philosophy at UCLA in 1962 with a dissertation on "The Interpretation of Theoretical Statements" written under the supervision of Rudolf Carnap.

In its introduction, the volume's editor David Macarthur of the University of Sydney hailed her as "an internationally renowned interpreter of James's and Dewey's visions of pragmatism.