In reply to UKC News:
After a visit to the UK in 1965 or 1966, Robbins brought back the idea of nuts for protection to the US, where the concept was utterly foreign. He published an article entitled "Nuts to You" in Summit Magazine around 1967. You sent $15 to Joe Brown's store and got back a package of nuts and tape, and that's how the clean climbing (meaning pitonless climbing) started in the US, where chromemolly pitons were already starting to damage cracks nationwide. (This was ironic, because the idea behind chromemolly was that pitons could be removed and reused, so that climbs would be left in their "pristine" condition for subsequent ascents, rather than becoming clip-ups as had happened in Europe with soft-iron pitons.)
Robbins certainly started and championed the clean climbing movement in the US, but it probably would not have gone far if Chouinard, risking his piton business, hadn't jumped on the bandwagon of environmental protection, developed a full range of nuts suitable for Yosemite cracks, and then used an essay by Doug Robinson in the popular Chouinard catalog to promote climbing without pitons. The movement progressed enormously when John Stannard in the East and Steve Wunsch in Colorado simply put their pitons away one day and started doing standard-breaking climbs with just nuts.
But the introduction of clean climbing to the US was only one of Robbins' achievements. He advanced both free-climbing and big-wall climbing standards and, perhaps more than anyone else at the time, advocated that the style of the ascent mattered as much, if not more, than the outcome. This focus on style and "fair means" is starting look rather quaint if not entirely anachonistic, and something heroic in American climbing now follows Robbins to his final resting place.