Odonians abandoned their history and heritage

Source: the dispossessed by ursula k leguin p. 129 Shevek reflects that he has no right to the bounty of Urras, built by the people on it. Odonians abandoned that history and were wrong to do so - they were adventurerers, not explorers. He's surrounded by buildings with history - "Ihav ebeen here for a long time, and I am strill here." Even odo wrote "to voyage is return", but the odonians never returned