“…But science does not stagnate. The Equivalence Relations, Relational Frames, Acceptance and Commitment literatures have advanced understanding and application far beyond 1957 to grapple with issues from prejudice to psychotherapy and beyond (Arntzen, Granmo, & Fields, 2017;Avellaneda et al, 2016;Ayres-Pereira, Canovas, Varella, & de Souza, 2018;Beurms, Traets, De Houwer, & Beckers, 2017;Bordieri, Kellum, Wilson, & Whiteman, 2016;Carp & Petursdottir, 2015;Dixon, Enoch, & Belisle, 2017;Eilifsen & Arntzen, 2017;Fox & Kyonka, 2017;Griffith, Ramos, Hill, & Miguel, 2018;Guinther, 2017;Jennings & Miguel, 2017;López-López & Luciano, 2017;Ma, Miguel, & Jennings, 2016;Maraccini, Houmanfar, & Szarko, 2016;May, Stewart, Baez, Freegard, & Dymond, 2017;Mensah & Arntzen, 2017;Mizael, de Almeida, Silveira, & de Rose, 2016;Plazas & Villamil, 2018;Rippy & Doughty, 2017;Silveira et al, 2016). Regardless of whether this work is labeled as Equivalence Relations, Relational Frames, or Acceptance and Commitment, the similarities outnumber the differences and we hope this special section paves the way for consilience between these diverse and vital research programs.…”