Butler told us that they survived 50,000 years through terrible droughts, cold, harsh weather and calamities in a way which was completely sustainable into the future. If the Europeans had not arrived they would still be living absolutely, comfortably and sustainably in their environment. “Their settlement was challenged when the Europeans came in. Most of the decline happened immediately because of the diseases that they brought in that killed off a chunk of the population which is estimated at 60 per cent within a decade or two. It was mainly small pox but there were other diseases, too. That was the biggest impact in decline, it was immediate and devastating,” he pointed out.