Digital preservation has significantly expanded over the past few decades, renewing old and creating new challenges related to provenance, integrity, completeness, and context in memory and preservation practices. In this paper we explore how, perhaps counterintuitively, a more extensive digital historical record offers greater opportunities to misrepresent reality. We first review a set of concepts and socio-cultural approaches to memory and preservation. We then focus on the multiplicity of digital memory and preservation practices today, examining their limits, possibilities, and tensions; (...) specifically, we explore the challenges of decontextualized data, personal versus institutional preservation, and?outsider? digital collections that are willingly and/or forcibly excluded from official accounts. Through these discussions, we review examples of what we consider good digital memory and preservation practices that take new approaches to context and collaboration. Lastly, we explore the optimism inherent in seeking to preserve human knowledge over the long term and to make it accessible to all. (shrink)