The modern concept of national sovereignty was agreed to in the Peace of Westphalia in 1648, following the thirty-year war, where the economically exhausted states of Europe agreed to establish the notion of territorial sovereignty as a norm of noninterference in the affairs of other nations, a principle that, more or less, holds to this day globally.
This was the point in time when modern nation-states, based on geographic boundaries, started to take a dominant position in how human society was organised, leading to today's situation where every square inch of land is claimed by at least one nation.
National sovereignty was, and remains, and extremely important and defining characteristic of modern civilisation. It not only grants powers to national governments, to the exclusion of external bodies, but also places responsibilities on them to provide some level of security, education and support for the people born and living within their sovereign borders. It creates the notion of citizenship, laws and taxes over property, income and commerce - measures that provide the security and public infrastructure that underpin society today.
However national sovereignty was developed at a time when the fastest form of transport was a horse, when messages were sent between locations by courier, smoke signals or carrier pigeons, when money only existed in your wallet and every business was tied to a geographic location, or an itinerant wandering tinker or merchant who could be physically tracked down.
There was little understanding of lightening, let alone electricity and even the invention of the Leyden jar, the first primitive capacitor (the word 'battery' hadn't been coined) was almost a hundred years in the future.
National sovereignty on the basis of geography made sense in 1648. The majority of people did not travel more than 100 miles from their birthplace, except during war, and it was possible to calculate a nation's wealth by adding up all the physical 'stuff' which in its borders (as the English had began doing in 1086 with the Domesday book - primarily for taxation purposes).
Today the majority of communication is electronic, as is the bulk of the money supply. While we still make lots of physical 'stuff', more and more of our services are delivered online and more and more physical stuff is imported and exported across national borders enable by electronic transactions.
While our garbage, roads, electricity and water are still delivered locally to where we live, more and more of our interactions with governments and companies, with welfare payments, education and even significant portions of health care able to be delivered remotely from any location on the planet - to peoples' homes directly or via virtual operators in physical offices (which Centrelink is already experimenting with).
This means that governments could theoretically outsource much of their service delivery to low cost areas within their jurisdiction - or to low-cost jurisdictions elsewhere in the world.
Beyond service delivery, a great deal of policy development could similarly be outsourced. There's really no need to employ locals to develop local policy - it is simply important to employ the best qualified staff and provide them with the best quality information and access to locals to understand their needs and concerns. Theoretically policy could already be developed anywhere in the world, using specialists with the experience to understand a jurisdiction's citizens and conditions in order to provide the best recommendations.
We see this on a small scale already - public officials at councils may live in neighbouring council regions. State and territory officials may live across a border in another state or territory. National governments tap foreign specialists and consultancy companies for expertise they cannot find in their own jurisdiction.
This outsourcing approach can even impact on geographically specific services - from emergency management to road maintenance. When digital networks can be used to supply information and cheap transport can be used to relocate assets to where they are needed on a timely basis, why should individual councils, or even state departments run road crews or location-specific emergency services?
Services can be delivered from wherever is reasonable and cost-effective - regardless of artificially imposed borders, with emergency services, road maintenance. We already see this in effect in emergency scenarios when specialist teams are moved around countries, or between countries, to assist in major disasters or provide expertise in unusual incidents.
So what does this mean for sovereignty in the 21st century, if a digitalised world and changes in power between governments, corporations and citizens mean that nations can no longer enforce their sovereignty in the ways envisaged in centuries past?
It is likely that most nations will continue to attempt to preserve the illusion of sovereignty - while it may not exist in fact, or to the extent it existed when geographic borders were 'solid', it is a convenient fiction that allows legal systems and state-based services to continue to perform their functions for the majority of systems.
However there will be increasing pressure on this illusion as transnational and stateless entities gain strength - whether through trade agreements (such as the TPP), remotely delivered services (either privately or publicly delivered) or through digital services that exist 'in the cloud' for real - not on a set of servers in a given jurisdiction but software that actually runs across the internet, with fractions of it operating on mobile devices, home and work computers all over the world.
At some point sovereignty will simply snap, probably due to technological advancement, but potentially also due to the constant demand for increasing profits and the need to minimise cross-border barriers to its generation.
What happens next is the question. Will states attempt to renegotiate the concept of sovereignty in a more limited form within broad global guidelines - a global government with local variations and customs?
Or might we see a division of services between geographic and non-geographic states - where geographically relevant services are delivered by geographic governments, or contracted commercial providers, while we reorganise ourselves into digital states for the provision of non-digital services - with the ability to easily change digital nationality, voting with our feet for the best offer as we do for commercial products.
We could even see the contracting of government to professional (commercial) providers, with citizens become shareholders and able to 'vote out' an entire public service and replace it with another. Like a body corporate approach, people would retain the right to vote for their representatives, however their role would be to manage the various commercial services that develop policy and deliver services for their constituents.
I wouldn't like to predict any specific outcome - we're still too early in our digital revolution to really know where things are likely to go.
However I do expect that people being people, no matter how we organise ourselves for governance and public service delivery some things will remain the same. People will identify with 'tribes' or communities, both those based on geography and those based on common interests (which might be non-geographic). These tribes will form the basis for our social organisation even if they don't form the basis of our public service delivery.
The young adult of 2090 will still identify as an Australian and a Victorian - even if his education was provided electronically through a Indian education provider, the local roads maintained by a corporation based out of the US, his 'local doctor' accessed virtually from a Brazilian medical centre (who also provides the nearby medical clinic's remote surgeon) and his student support payments organised and paid via a Phillippino service desk. He will still follow his favourite football team - Real Madrid - attending their games remotely via his 3D headset, and socialise with friends from around the world in virtual nightclubs (with no closing hour).
He will attend university online and work virtually, using office software hosted in the cloud that is designed by a stateless entity, charging for time used and paying for the use of his devices' processing cycles (where it is virtually hosted across millions of devices).
He will even vote digitally - not just every three years but on every major topic for which he is interested and has met the qualifying conditions (based on his knowledge of the subject and its impact on his life), with government services divided by tier into a local geographic council and a digital non-geographic state.
He will still be an Australian - even if (or when) his government, and many public services, are delivered via the cloud.