More eye-catching has been the political revolutions, popular uprisings and protests in emerging markets. This spans June's demonstrations in Brazil (the largest in the country for two decades); through to the remarkable developments in North Africa and the Middle East, including the civil war in Syria which now occupies much international attention; revolutionary changes of power in Egypt, Tunisia and Libya; transfer of power in Yemen; plus demonstrations and uprisings in Turkey, Iran, Algeria, Bahrain, Jordan, Morocco and Oman.
This disparate range of political instability, from Rio to Athens to Cairo, has reportedly been described as "a revolutionary wave, like 1848" by Sir Nigel Inkster, former director of operations for the UK Secret Intelligence Service. Others have compared the situation to 1914, 1968 and 1989.
Whatever the validity of these historical analogies, it is clear there are some factors new to the post-2008 period, including the role of social media. Moreover, this "wave" of political instability has diverse origins with economic issues not the only driver.
Thus, unrest in the Middle East has often stemmed from deep-seated political and socio-economic discontent that pre-dates the financial crisis. Post-2008, however, factors including liquidity crunches, increased food prices and unemployment spikes, have exacerbated these longer-standing grievances.
In the EU, the role of economic downturn and austerity has been central to unrest in numerous countries, especially those most impacted by the Eurozone crisis like Greece and Spain. Even here, though, unrest has tapped into pre-existing disquiet with established political parties and systems.
Five years from 2008, a key question is whether political instability will tail off, especially if economic recovery takes hold in much of the world in coming years. While this is possible, there are at least two sets of factors that will continue to fuel protest and uprising in some countries.
There are drivers, unrelated to the financial crisis, that have been common to much of the political unrest, that will endure. This includes the disruptive role of social media.
There remains debate about how instrumental social media has been in fomenting political instability. However, whether one sees it as an essential component that translated discontent into concrete action, or accentuated what was already inevitable, indisputably it has played an enabling role that will probably only grow.
Even if the worst of the financial crisis has now passed, its consequences endure, especially for the young. People aged 15 to 24 constitute 17 per cent of the global population, but 40 per cent of the unemployed, a figure the International Labour Organisation forecasts will grow. This puts many at risk of long-term damage to their earnings potential and job prospects, fuelling discontent.
In the EU, around 5.6 million people aged 15 to 24 are unable to find work (a record 24.4 per cent) as career opportunity structures have been swept away for many. This has given rise to concern, including from German Chancellor Angela Merkel about a "lost generation", especially in Greece and Spain where youth unemployment now tops a staggering 50 per cent.
As in Europe, youth unemployment in numerous Middle Eastern and North African countries is above 50 per cent, and it is estimated that the region's average rate could reach 30 per cent within five years. In the Middle East, the problem is acute because it has the world's biggest youth bulge comprising increasingly educated people.
Taken as a whole, it is premature to claim, as some have done, that we have entered a new era of global revolution that is here to stay. Indeed, political instability may decline if the world economy enters a sustained recovery phase.
However, there remains significant prospect of unrest. While circumstances will vary from country to country, instability will potentially be fuelled not just by legacy of the financial crisis such as higher youth unemployment, but also by longer-standing political and socio-economic discontent to which social media is giving fresh impetus.
Andrew Hammond, an associate partner at ReputationInc, was a special adviser to the Blair Government in Britain and a senior geopolitics consultant at Oxford Analytica.