Luhe, I already said that 'farming is hard' so I don't know why you felt it would be a good use of your time to explain that very thing to me. I am not taking a romantic view of the past, as if I think we need to move away from much of our current economic values for nothing other than a reactionary opposition to 'progress' - instead, I recognise that our world has limits, and many of the current 'choices and convenience' will not be an option to future generations because we are destroying much of our Earth in the pursuit of them for ourselves.
Whatshallicallmyself, the 'indigenous' view is certainly not irrelevant, regardless of population size and the scales of farming we need, we need to have a stronger relationship to land and place in order to preserve it for future generations - "During the last 40 years, nearly one-third of the world's arable land has been lost by erosion and continues to be lost at a rate of more than 10 million hectares per year." - There is no 'method of sustainability' in this, or 'different management techniques' that take into account larger populations - there is only destruction in the pursuit of our own conveniences.
Source for above: "Environmental and economic costs of soil erosion and conservation benefits" by Pimental - this is available for you to read on Google scholar if you're interested