Transforming the Internal World and Attachment reviews and discusses four theories about what makes psychotherapy effective across forms of treatment, treatment settings, and diagnostic categories: mindfulness, mentalization, psychological mindedness, and the attachment relationship. Geoff Goodman offers some provisional hypotheses about therapeutic effectiveness and suggests some ways of testing these hypotheses empirically, using sophisticated assessment instruments that measure psychotherapy process and outcome. Goodman suggests that the therapeutic community's survival depends on submitting its craft to empirical scrutiny before the pharmaceutical drug lords strip it away from us.