Proof of work and potlatch as signaling systems

Proof of work and potlatch as signaling systems

If you could magically rewind the clock to the early days of Bitcoin, you’d find a network buzzing with idealism and relatively simple dynamics. People used their laptops to mine blocks, extending the blockchain and earning rewards in a system that felt like digital alchemy. Fast forward to today, and that idyllic scene has been replaced by industrial mining operations, multi-million-dollar facilities, and a complex web of incentives. This evolution wasn’t random—it’s a story of growth, adaptation, and finding balance between competition and cooperation. But to understand where Bitcoin is going, we first need to revisit where it all started: Proof of Work (PoW).

Proof of Work and the longest honest chain

At its core, Bitcoin is built on PoW, a system that requires participants to burn computational energy (and by extension, real-world resources) to validate transactions and secure the network. It’s an elegant idea: the longest chain with the most computational work invested is the honest one. Parties extending the blockchain “vote with their CPU power, expressing their acceptance of valid blocks by working on extending them and rejecting invalid blocks by refusing to work on them.” But what defines the parties who get to extend the public record of transaction history that goes all the way back to Bitcoin’s inception in 2009, and by which mechanisms do they demonstrate to each other and everyone else watching and using the network that the process by which they extend the public record every ~10 minutes can be trusted? A seemingly unrelated and little known ritual performed since time immemorial may be able to shed light on this matter.

The Potlatch Ritual

Let’s talk about the potlatch, a practice among Indigenous peoples of the Pacific Northwest. Leaders would throw lavish ceremonies where they’d give away or destroy their wealth to assert power, reaffirm territorial rights, and maintain social order, not unlike the process of bitcoin mining. A potlatch wasn’t just about flexing wealth — it was a system of diplomacy based on providing a costly signal to their community. However when Native American tribes encountered external powers, like American settlers, the potlatch alone wasn’t enough to maintain order. Over time settlers found ways to inflate the supply of wampum, the currency traditionally used by Indigenous populations, which was sacrificed in potlatches as a costly signal. This manipulation undermined the integrity of the signal, as the settlers could provide wealth that wasn’t genuinely earned or scarce, which weakened the trust-based social system. This led to the need for new methods of determining truth and honesty. The Indigenous communities began to grow more distrustful of unknown parties and collaborated more closely with known parties. They also adapted the potlatch ritual, incorporating additional elements of diplomacy and negotiation to better assess the legitimacy of signals and protect their social order. Bitcoin’s growth echoes this. Its “potlatch” is PoW — a display of computational energy burned to secure the network. But as the system scales, diplomacy between its infrastructure providers, also known as mining pools, which each individually choose to extend or ignore each others chain tip, becomes increasingly necessary to maintain the network’s integrity.

Mining Pools and the evolution of incentives

The early days of Bitcoin were all about individuals mining blocks on consumer hardware. Then, mining pools came along, pooling resources and dominating block production. The Bitcoin whitepaper didn’t foresee this shift, nor the rise of specialized mining hardware. These pools now compete fiercely, optimizing for profitability in a world where block rewards halve every four years and transaction fees are expected to decrease over time. In Bitcoin, mining pools maintain the network’s integrity through security by transparency—publicly demonstrating accountability by openly building on or rejecting each other’s blocks, creating a reliable public record of time-stamped information, and ensuring the system’s rules remain verifiable and trustworthy. Through the process of competition they face continuous pressure to innovate which in turn helps scale up network connectivity. They invest in cutting-edge hardware, energy-efficient setups, and strategic locations with low electricity costs. Some prioritize high-fee transactions to maximize revenue, while others enter partnerships to share infrastructure or develop proprietary software for a competitive edge. Bitcoin’s versatile scripting language that was there from its inception, and its support for overlay networks have also opened new doors—like timestamping data or executing computational tasks through transactions—offering novel business models and capabilities for its users.

The potlatch and the future of Bitcoin

The parallels between Bitcoin’s evolution and the potlatch ritual are striking. Over time, the potlatch adapted to external pressures, blending its costly displays with diplomacy to preserve its relevance. Similarly, Bitcoin’s PoW mechanism, while powerful, relies on mining pools evolving their strategies and relationships to sustain the network as it scales.

As mining pools innovate and collaborate, Bitcoin grows from a simple peer-to-peer system between a single type of user who both transacted and extended the blockchain, into a peer network of mining pools extending the blockchain, and a peer network of transacting users, lowering transaction costs, and fostering innovation. In the end, the success of Bitcoin depends on the same principles that sustained the potlatch: balancing public displays of commitment with the quiet power of collaboration.