How Digital Currencies Could Enable Borderless Mutual Aid

Let's start with the scale of the problem, because most people in wealthy countries have no idea.

In 2023, international remittances — money sent home by migrant workers — totaled approximately $656 billion, according to the World Bank. That's more than three times the total of all international development aid. Remittances are the single largest financial flow from the rich world to the poor world, and they come not from governments or institutions but from individuals working abroad and sending money to families.

The average cost of sending $200 across borders was 6.2% in Q4 2023 (World Bank Remittance Prices Worldwide database). For some corridors, it's much worse. Sending money from South Africa to neighboring countries costs over 15%. Sub-Saharan Africa is the most expensive remittance-receiving region on earth.

Who pays this fee? The sender — typically a low-wage worker in construction, domestic service, agriculture, or manufacturing. The fee is extracted by:

1. The sending agent (Western Union, MoneyGram, bank). 2. Correspondent banks in the intermediary chain. 3. Currency conversion spreads — the exchange rate offered to the sender is typically 1-3% worse than the market rate, which is a hidden fee. 4. The receiving agent (sometimes an additional fee on the other end).

The UN Sustainable Development Goals set a target of reducing remittance fees to 3% by 2030. As of 2024, only a handful of corridors meet this target. The industry has no structural incentive to lower fees, because the senders are price-inelastic — they'll pay whatever it costs because the alternative is their family not eating.

This is where crypto enters the picture with a legitimate use case.

El Salvador adopted Bitcoin as legal tender in September 2021 under President Nayib Bukele. The international coverage was almost entirely about Bukele's authoritarianism, the forced adoption, the Chivo wallet glitches, and the volatility risk. That coverage was mostly accurate. But it missed the remittance story.

Remittances account for roughly 24% of El Salvador's GDP — about $7.7 billion in 2023. The vast majority comes from Salvadorans working in the United States. Pre-Bitcoin, the dominant remittance channel was Western Union and similar services, charging 3-6% per transaction.

The Lightning Network — a second-layer protocol built on Bitcoin that enables near-instant, near-zero-fee transactions — offered an alternative. Services like Strike allowed US-based Salvadorans to send dollars, have them converted to Bitcoin, transmitted over Lightning, and converted back to dollars in El Salvador. The total fee: under 1%. Often under 0.5%.

For a family receiving $200/month, the difference between a 6% fee and a 0.5% fee is $11/month — $132/year. In a country where the minimum wage is approximately $365/month, that's significant.

The adoption data is complicated. The Chivo wallet saw high initial downloads but lower sustained usage. Many Salvadorans preferred to immediately convert Bitcoin to dollars rather than hold it. The volatility of Bitcoin itself — a 60% drawdown from November 2021 to June 2022 — genuinely hurt people who held rather than converted.

The lesson: the payment rails (Lightning Network, near-zero fees, instant settlement) work. The store of value proposition (hold Bitcoin, number go up) was and remains a gamble that poor families cannot afford.

Argentina's case is different and more instructive for mutual aid.

With annual inflation exceeding 200% in late 2023 and into 2024, the Argentine peso lost purchasing power in real time. The government imposed capital controls (the "cepo cambiario") restricting dollar purchases. The black market dollar rate (the "blue dollar") diverged 50-100% from the official rate.

In this context, Argentines — especially the urban middle class and younger demographics — adopted stablecoins, primarily USDT (Tether) and USDC (Circle), not as investments but as savings technology. The behavior:

1. Receive salary in pesos. 2. Immediately convert a portion to USDT via a local exchange (many operating in legal grey zones). 3. Hold USDT until needed. 4. Convert back to pesos when making purchases.

This isn't speculative crypto culture. This is rational behavior under monetary duress. Chainalysis data showed Argentina as one of the highest-per-capita stablecoin adoption countries globally.

For mutual aid, the implications are significant: stablecoins provide a way for diaspora communities to send inflation-proof value to family members in collapsing economies, bypassing both remittance fees and the inflation that erodes the value of the transfer between receipt and spending.

Before crypto, mobile money already proved that digital transfer could transform mutual aid in developing economies.

M-Pesa launched in Kenya in 2007 through Safaricom. By 2024, it had over 50 million active users across East Africa, processing the equivalent of more than 50% of Kenya's GDP annually. The system is simple: users deposit cash with a local agent (a kiosk, a shop), the value is stored on their phone as mobile money, and they can transfer it to anyone with a phone number.

The effects on mutual aid are documented:

- Tavneet Suri and William Jack (2016, Science): Households with access to M-Pesa in Kenya were able to weather negative income shocks (illness, crop failure, job loss) significantly better than households without access. The mechanism: when hit by a shock, M-Pesa users received transfers from a wider network of friends and family, faster. Mobile money expanded the mutual aid radius.

- Emergency response. During droughts, floods, and COVID-19, M-Pesa enabled rapid informal transfers that constituted a de facto mutual aid network, faster than any government or NGO response.

- Women's economic autonomy. Suri and Jack found that M-Pesa access moved approximately 185,000 women out of subsistence farming and into business or retail occupations. The mechanism: mobile money gave women control over funds that would previously have been controlled by male household members.

Mobile money isn't crypto. It's centralized (run by Safaricom/Vodafone), requires KYC (know-your-customer) compliance, and operates within the existing financial system. But it demonstrates the principle: reducing transfer friction enables mutual aid at scale.

GiveDirectly has done more to advance the evidence base for direct cash transfers than any other organization.

Founded in 2008 by development economists from MIT and Harvard, GiveDirectly's model is deliberately simple: identify extremely poor households (using satellite imagery and survey data), enroll them, and transfer money directly to their mobile phone. No conditions. No training requirements. No paternalistic directives about what to spend it on.

Key findings from randomized controlled trials:

- Haushofer and Shapiro (2016, Quarterly Journal of Economics): Unconditional cash transfers of approximately $1,000 to poor Kenyan households increased consumption, asset holdings, and psychological well-being. Effects persisted for at least three years. No increase in spending on alcohol or tobacco.

- Egger et al. (2022, Econometrica): A large-scale GiveDirectly program in Kenya showed significant positive spillover effects — even households that didn't receive transfers benefited because the cash injected into the local economy increased demand for local goods and services. The local economic multiplier was approximately 2.6x, meaning every $1 transferred generated $2.60 in local economic activity.

- Banerjee et al. (2020): A comparison of cash transfers versus multifaceted "graduation" programs (which include training, asset transfer, coaching) found that cash transfers produced comparable outcomes at a fraction of the administrative cost.

The direct cash transfer evidence is one of the most robust findings in development economics. Poor people, given money, make good decisions with it. The bottleneck has always been getting the money there cheaply and directly.

Beyond simple transfer, blockchain enables a more radical possibility: programmable currencies designed for specific community purposes.

Grassroots Economics (Kenya). Founded by Will Ruddick, this project creates community inclusion currencies (CICs) — local digital currencies backed by community economic activity rather than national currency. In Kenyan informal settlements, CICs circulate alongside the Kenyan shilling, enabling trade among community members even when shillings are scarce. The currency is designed to circulate locally, not to be extracted — it functions as a mutual aid accelerator.

Sarafu Network. Built on blockchain (now using Celo), the Sarafu Network allows communities to create, manage, and trade local currencies. During COVID-19 lockdowns, when formal economy income collapsed, communities using Sarafu currencies maintained trade and mutual support at significantly higher levels than surrounding communities.

Circles UBI (Berlin). An experimental universal basic income protocol on blockchain where each participant mints their own personal currency. Trust connections between participants determine currency acceptance. It's small-scale and experimental, but it demonstrates the concept: programmable money that enforces mutual aid principles in its architecture.

The honest assessment:

It cannot solve governance. A perfectly transparent, zero-fee, instant digital transfer system is useless if the receiving community has no functional governance. Aid flows into kleptocratic environments have always been captured by elites, and blockchain doesn't change the power dynamics that enable capture — it just makes the capture visible (if anyone is looking).

It cannot create trust. Mutual aid is built on relationships, reputation, and reciprocity. Blockchain can record transactions transparently, but it cannot make strangers trust each other. The communities where mutual aid works best — tight-knit diasporas, religious congregations, neighborhood networks — have trust infrastructure built over years or generations. Crypto plugs into that trust. It doesn't generate it.

It cannot reach the truly disconnected. As of 2024, approximately 2.6 billion people have no internet access. In the countries with the highest need for mutual aid — fragile states, conflict zones, remote rural areas — connectivity is worst. Mobile money reaches further than crypto because it works on feature phones with SMS. Crypto requires smartphones and data connections that the poorest populations often lack.

It cannot replace institutions. The libertarian fantasy of crypto replacing government is exactly that — a fantasy. Every functioning mutual aid system in history has existed within, alongside, or in negotiation with institutional power. GiveDirectly works because it operates in countries with enough state infrastructure to maintain property rights, market access, and physical security. In the absence of those, money — digital or physical — doesn't help.

Strip away the hype and look at what's real in 2024-2025:

1. Remittance savings. Lightning Network and stablecoin corridors are saving meaningful money for migrant workers sending funds to El Salvador, the Philippines, Nigeria, and other major remittance-receiving countries.

2. Inflation hedging. Stablecoin adoption in Argentina, Turkey, Nigeria, and Lebanon is protecting savings for people locked out of dollar access by capital controls.

3. Humanitarian response speed. The UN World Food Programme's Building Blocks system used blockchain to deliver cash-based assistance to Syrian refugees in Jordan, reducing costs and increasing recipient control.

4. Diaspora direct giving. Platforms combining crypto rails with last-mile mobile money conversion are enabling direct diaspora-to-family transfers that bypass both traditional remittance operators and centralized aid bureaucracies.

Step 1: Track where your money goes when you give. If you donate to an international charity, research what percentage of your dollar actually reaches a recipient. (The answer is often 60-70% after administrative, fundraising, and overhead costs.)

Step 2: Identify one direct transfer option. Research GiveDirectly, direct crypto remittance services, or community inclusion currency projects. Consider moving even a small portion of your giving to a direct transfer channel.

Step 3: Examine your assumptions. Do you trust poor people to spend money wisely? If not, examine where that distrust comes from. The evidence is unambiguous: they do.

Step 4: Follow the fees. If you send money internationally — to family, to friends, to anyone — check what percentage you're losing to intermediaries. Then ask: does that intermediary deserve that cut? Is there a cheaper pipe?

The premise of this book: if every person said yes to our shared humanity, world hunger ends, world peace becomes achievable.

That yes needs plumbing. The feeling of solidarity is necessary but not sufficient. It needs infrastructure — pipes through which material support actually flows from those who have more to those who have less, without tollbooths extracting value at every crossing.

Digital currencies, stablecoins, mobile money, and direct transfer platforms are building that plumbing. They're not the solidarity itself. They're not the yes. But they might be what makes the yes operational — the difference between wanting to help and the help arriving, intact, in someone's hands.

The technology is ready. The infrastructure is being built. The question, as always, is the will.