The sociologist Barry Turner, in a 1976 study, identified several errors that led to the Aberfan disaster. These included years of rigid and unrealistic disregard for the importance of the safety of the above-ground tips (as opposed to dangers within the mines); a flawed decision-making process which ignored or minimised the likelihood and the scale of the emergent danger; a dismissive attitude toward the complaints from Aberfan residents, discounting the validity of their concerns; and an incomplete and inadequate response to conditions which caused those complaints.