Poverty anywhere is a threat to prosperity everywhere.

One Market Cart in Sidi Bouzid

On 17 December 2010, Mohamed Bouazizi, a young fruit seller in the small Tunisian town of Sidi Bouzid, set himself on fire after officials confiscated his produce and humiliated him. He was one poor man in one forgotten town. Within weeks Tunisia's government had fallen; within months protests had swept Egypt, Libya, Syria and Yemen, oil prices jumped, and refugees from the wars that followed were crossing the Mediterranean towards Europe. A single act of despair at the margins of the world economy had shaken its centre. The International Labour Organization had anticipated exactly this in its Declaration of Philadelphia of 1944, which declared that poverty anywhere constitutes a danger to prosperity everywhere. In an interdependent world, prosperity cannot be fenced off: poverty, left alone, travels as unrest, disease, migration and lost demand, and returns to the doorstep of the rich.

To understand why, we must first see what poverty really is. It is not only a shortfall of income below a line drawn by the World Bank. Amartya Sen taught us to see it as a deprivation of capabilities, the freedom to be healthy, educated, secure and heard. NITI Aayog's National Multidimensional Poverty Index follows the same idea, measuring health, education and living standards together. Prosperity, likewise, is more than wealth; it is the security to enjoy that wealth in a stable, healthy and peaceful society. Once the two are defined this way, their link becomes clear. A person deprived of capabilities is not only poorer; the whole society around that person loses a worker, a consumer, a taxpayer and a citizen.

The first channel of the threat is economic. A modern economy grows only when people can buy what it produces. Keynes showed during the Great Depression that falling incomes at the bottom shrink aggregate demand for everyone, and the beggar-thy-neighbour tariffs of the 1930s spread one country's slump to the rest. The lesson was learnt after the Second World War: the Marshall Plan of 1948 rebuilt a ruined Europe not out of charity alone but because a destitute Europe would have been neither a market for American goods nor a bulwark of stability. Today, global supply chains carry the same logic. A factory in Bangladesh, a mine in Congo and a software firm in Bengaluru are links in one chain, and poverty that weakens any link raises the cost of the whole.

Moreover, poverty breeds insecurity that respects no border. Deprivation, joined to injustice and a weak state, gives grievance its fuel. The collapse of Somalia's state and fisheries was followed by the piracy that menaced shipping in the Gulf of Aden in the late 2000s, raising insurance costs for trade far away. Within India, the Planning Commission's Expert Group on Development Challenges in Extremist Affected Areas (2008), chaired by D. Bandyopadhyay, traced the spread of Left Wing Extremism to land alienation, displacement and the neglect of tribal regions. Martin Luther King Jr. wrote from a Birmingham jail in 1963 that injustice anywhere is a threat to justice everywhere; the same holds for want, because a society that cannot feed its margins cannot keep its centre safe.

Injustice anywhere is a threat to justice everywhere.

Building upon this, poverty also travels as disease. Crowded housing, unsafe water and weak clinics are where infections take root and spread. The Ebola epidemic of 2014-16 began in the poorest districts of Guinea, Sierra Leone and Liberia, where health systems were thinnest, and soon cases appeared in Europe and the United States. The COVID-19 pandemic proved the point from the other side: a global economy that had ignored the health of its poorest saw supply chains break everywhere, and the World Bank estimated that around 70 million people were pushed into extreme poverty in 2020, the first rise in a generation. Vaccine inequity only lengthened the crisis, because a virus that circulates freely in one region can return to all others in a new variant.

The threat runs through the environment and through migration as well. The poor depend most directly on forests, rivers and rain, so poverty often forces the overuse of soil and woodland, while climate change, caused mainly by the rich, falls hardest on the poor. A drought in the Sahel or a flood in Pakistan becomes a migration story in Europe or the Gulf within a few seasons. Recognising this, the parties to the climate convention agreed at COP27 in Sharm el-Sheikh in 2022 to set up a fund for loss and damage, an admission that the vulnerability of poor nations is a shared problem. Distress migration, if unmanaged, strains cities and fuels resentment in host societies, turning economic exclusion into political polarisation.

Yet honesty demands that we face the antithesis. History offers long periods in which prosperity coexisted with, and even fed upon, poverty elsewhere. Dadabhai Naoroji's drain theory showed how colonial Britain grew rich while India grew poorer, and Bengal's famine of 1943 did not dent the prosperity of London. Today, too, gated enclaves sit beside slums in every great city, and the rich seem able to buy private security, private schools and private hospitals. But this coexistence is fragile and costly. The empire that drained India also bred the nationalism that ended it, and the private walls of the rich are expensive substitutes for a public peace that only shared prosperity can supply. The antithesis, then, shows not that poverty is harmless to the prosperous, but that its costs are deferred, displaced and eventually collected with interest.

India's own journey shows both the danger and the remedy. Dr. B.R. Ambedkar warned the Constituent Assembly in November 1949 that political democracy without social and economic democracy would lead the republic into a life of contradictions that could blow up the structure itself. The country has since built a wide floor under its poorest. MGNREGA (2005) guarantees wage work to rural households, the National Food Security Act (2013) and the free grain of the PM Garib Kalyan Anna Yojana have protected roughly 80 crore people from hunger, and Jan Dhan accounts joined to Aadhaar and mobile phones carry benefits directly to the beneficiary. NITI Aayog's discussion paper of January 2024 estimated that 24.82 crore Indians escaped multidimensional poverty between 2013-14 and 2022-23. That gain did not come at the cost of prosperity; it widened the market, the workforce and the tax base on which India's growth now rests.

What, then, must be done? Within nations, the answer lies in inclusive growth: jobs in labour-intensive manufacturing, quality schooling and health care, and social protection that cushions shocks without trapping people in dependence. Bangladesh's Grameen Bank, whose founder Muhammad Yunus shared the Nobel Peace Prize in 2006, and Kerala's Kudumbashree show that credit and collective action can lift women out of poverty while strengthening local economies. Between nations, it means fair trade rules, debt relief for the most distressed economies, climate finance that reaches the vulnerable, and global public goods such as vaccines shared in time. Sustainable Development Goal 1 and the 2030 Agenda's pledge to leave no one behind express the same insight in the language of policy.

There is, finally, a moral truth beneath the practical one. Gandhi's talisman asked every decision-maker to recall the face of the poorest person they had seen and ask whether the step they contemplated would be of any use to that person. India chose "One Earth, One Family, One Future" as the theme of its G20 presidency in 2023, echoing the ancient ideal of Vasudhaiva Kutumbakam. If the world is a single family, then the hunger of one member cannot be a private matter of that member alone.

Mohamed Bouazizi's cart and produce were worth very little, yet their loss shook a region and reached far beyond it. That is the enduring lesson of the Declaration of Philadelphia. Prosperity that ignores poverty is a house built on a cracked foundation, secure only until the next shock. The choice before nations, as before families, is not between their own welfare and that of the poor, but between a shared prosperity that lasts and a fortified one that sooner or later fails. To end poverty anywhere is, in the end, the surest way to protect prosperity everywhere.