Ideation-to-action theories of suicide: a conceptual and empirical update

•Several ‘ideation-to-action’ theories of suicide have been published since 2005.•These theories meaningfully advance understanding of suicide.•Pain and hopelessness are important motivators of suicidal ideation.•Capability for suicide facilitates progression from suicide ideation to attempts.•Evidence-based aspects of ideation-to-action theories can guide prevention.