The ACA Summer Course in Chemical Crystallography is committed to diversity and inclusiveness, as outlined in the IUCr statement on gender balance and the IUCr Conference Code of Conduct. Scientific teaching and innovation require bringing together both diverse ideas and people from varied backgrounds who may have different world views and ways of solving problems. We seek to include and engage attendees and faculty across age, gender identity and expression, race, nationality, ethnicity, physical ability, marital status, sexual orientation, socioeconomic status, military or veteran status, or any other facet of social diversity in our society and seeks to remove obstacles to their professional growth and advancement. The ACA Summer Course strives to achieve diversity and gender balance among its teaching faculty and attendees and to provide a welcoming and inclusive environment for people from all backgrounds.