According to a Chinese proverb, mountains turn to gold, if two brothers work together. We do not expect that much from the interaction of the International Society of Developmental Biologists (ISDB) with the Journal Mechanisms of Development (MOD), but we surely appreciate the benefits. Since the advantages to MOD are addressed by the editors in the accompanying Editorial, this is the place to outline the benefits to ISDB. Before doing so, it is appropriate to provide some background of the Society in more general terms. The ISDB is a nonprofit scientific association which has as its aim the promotion of the study of developmental biology by providing a forum for the scientific discussion of problems and for the publication of the results of research by promoting the orgsnisation of international congresses and symposia by encouraging the establishment and improvement of research laboratories which are accessible to students of all nationalities by organising research projects and advanced courses in which the cooperation of investigators of different countries and different disciplines is advantageous by facilitating preparation and publication of bibliographies and other communications which may be of help in the coordination of research between different countries and by encouraging the establishment of central collections of material, slides and scientific publications. The ISDB originated as the ‘Institute d’Embryology International’ and was, several decades ago, perhaps the only international organisation for embryology and developmental biology. Under its auspices many international congresses have been held and thus it was and still is a vocal point for developmental biology. Since developmental biology is now represented by many national organisations, the board of ISDB under the previous presidency of John Gurdon adjusted ISDB’s structure. As a consequence, ISDB not only continues to serve individuals, it also can act as an umbrella organisation, coordinating the international activities of national developmental biological societies. Therefore, two categories of membership, the corporate membership for national societies and personal membership for individuals are available. During John Gurdon’s presidency, the American Society for Developmental Biology, the Japanese Society for Developmental Biology, and the European Developmental Biology Organisation have become corporate members of the ISDB. The current activities of the ISDB include the sponsoring of an international congress every 4 years, the production and distribution of a newsletter, the provision of support to certain small developmental biological meetings and the award of the Harrison Prize. The association of ISDB and MOD will have several advantages for ISDB. The benefits include: MOD will serve as the official journal for ISDB. ISDB business matters and announcements, referred to as ISDB news section will be available free of charge members of the ISDB are entitled to a reduced rate subscription to the journal ISDB receives some additional financial contribution, dedicated primarily to the support of the ISDB conferences, other meetings and the Harrison Prize. These are considerable advantages for the benefit not only of ISDB, but rather for the entire field of developmental biology. We are therefore greatly pleased that from this issue onwards Mechanisms of Development and the International Society of Developmental Biologists will be associated.