Web1 revolved around information gathering, Web2 around large platforms to disseminate that information, but Web3... Web3 took a different path. The third turn in the history of the World Wide Web was complete around 2013, with the first mentions in 2014. Gavin Wood seems to be the inventor; he used the term to describe a decentralized internet.

What happened in this shift, and what factors played a role? To understand that, we first go back to 2008 and a

Unnecessary intermediaries: the start of Bitcoin

Ah, 2008: the iPhone has taken over the market, Joran van der Sloot is unmasked, and house prices... let's not go there. In the same year, one Satoshi Nakamoto published a whitepaper on a topic we will hear more about later. The document, titled Bitcoin: A Peer-to-Peer Electronic Cash System, describes a system that enables digital transactions without a central authority, using a distributed ledger and cryptographic proof.

On January 3, 2009, a few months after the publication, the 'Genesis Block' was mined - the starting point of the Bitcoin blockchain.

All nice and well, you might think now, but the real innovation lies not in the emergence of digital currency, but in solving a fundamental problem: the double-spending problem without a central party. For the first time, trust could be replaced by mathematics and consensus mechanisms.

From currency to programmable infrastructure

Bitcoin was primarily designed as digital money. But it soon became clear that the underlying technology, the blockchain, was applicable in a broader sense.

In July 2015, Ethereum was launched. Ethereum introduced a crucial concept, based on an idea from Nick Szabo: smart contracts. These are pieces of programmable logic that run on the blockchain and are automatically executed when certain conditions are met.

While Bitcoin primarily records transactions, Ethereum offers a general programmable platform. This fundamentally changed the playing field. Developers could now:
 

• Build decentralized applications (dApps)
• Create tokens
• Develop financial protocols
• Code governance mechanisms

Web3 thus became more than a payment layer; it became an alternative application infrastructure.

The core of Web3: ownership and control

Web3 distinguishes itself in the history of the World Wide Web from Web2 by three fundamental principles:

1. Decentralization

Data and logic are not managed by a single central party, but distributed across nodes in a network.

2. Cryptographic identity

Instead of accounts managed by platforms, users use cryptographic keys to access assets and applications.

3. Token economy

Value exchange and ownership are recorded via tokens, or programmable digital assets.

In Web2, the platform owns the data. In Web3, the user (in theory) owns their wallet and digital assets. That is, in short, the difference. In longer terms?

Architectural differences with Web2

In Web2:
 

• Application logic runs on central servers
• Databases are managed by a single organization
• Authentication occurs via platform accounts
• Updates can be rolled out unilaterally

In Web3:
 

• State is recorded on a distributed ledger
• Smart contracts are publicly visible
• Interaction occurs via wallets and private keys
• Code is (in principle) immutable after deployment

This means that deployment strategies, security audits, and monitoring are radically different. 

2016: the reality check of The DAO

The ideals of Web3 were tested early on.

In 2016, The DAO was launched: a decentralized investment fund on Ethereum. In a short time, around 150 million dollars worth of ether was raised. Shortly thereafter, a vulnerability in the smart contract code was exploited, resulting in about 50 million dollars being siphoned off.

The event led to a fundamental debate: should code be immutable, or can it be intervened? Ultimately, the Ethereum blockchain was adjusted via a hard fork, resulting in two networks: Ethereum (ETH) and Ethereum Classic (ETC).

For IT professionals, this was an important moment. It showed that:
 

• Smart contracts are not immune to bugs
• Governance in decentralized systems is complex
• Immutability is both a strength and a risk

Web3 was not a utopia — it was software, with all its associated vulnerabilities.

2017–2021: DeFi, NFTs, and exponential growth

Between 2017 and 2021, Web3 grew explosively. DeFi (Decentralized Finance) protocols made it possible to build loans, derivatives, and trading platforms without traditional banks. Additionally, NFTs (Non-Fungible Tokens) introduced digital scarcity for art, music, and other assets.

According to various market analyses, the total value locked in DeFi protocols reached hundreds of billions of dollars in 2021. Although these figures fluctuated greatly, it became clear that Web2 was truly over.

Scalability and energy: structural challenges

Web3 also has clear limitations. Blockchains inherently have scalability issues. Each node must validate and replicate transactions, which limits throughput.

Moreover, energy consumption was long a point of criticism, especially with proof-of-work systems like Bitcoin. Ethereum switched to proof-of-stake in September 2022 (the so-called 'Merge'), which, according to them, drastically reduced energy consumption.

However, trade-offs remain between decentralization, security, and scalability. This is also known as the 'blockchain trilemma'.

Ideology versus reality

Web3 is often presented as liberation from platform power. But in practice, we also see:
 

• Concentration of tokens among early investors
• Centralization of infrastructure (for example, through large cloud providers hosting nodes)
• Complexity for end-users

And companies like Meta have, of course, only grown further. The question is whether Web3 truly decentralizes or merely creates new power structures. What is undeniable is that Web3 has reopened the debate on digital ownership and governance.

Web3 as a parallel layer

Okay, one more thing about Meta. It is important to emphasize: Web3 does not replace Web2. It operates alongside it.

Many Web3 applications still use traditional web interfaces, cloud hosting, and APIs. The blockchain often serves as a settlement or ownership layer, while the user experience largely remains Web2.

Web3 is therefore not a completely new internet, but an additional architecture for specific use cases:
 

• Financial transactions
• Digital ownership registration
• Decentralized governance
• On-chain identity models

The history of the World Wide Web: the last chapter?

Web3 is an attempt to redefine the power structure of the internet. Where Web2 revolved around centralized platforms and data monetization, Web3 places cryptography and decentralization at its core.

It started with Bitcoin as a trustless payment network. It became programmable with Ethereum. It grew through DeFi and NFTs. And it still struggles with scalability, security, and governance.

Whether Web3 becomes the dominant model is uncertain. What is certain is that it has opened a fundamental discussion about ownership, control, and trust on the internet. Meanwhile, the next era is already around the corner.

In the next and final part of this series, we will look at Web4; a less sharply defined but intriguing phase in which AI (agents) and context-aware systems may reshape the web again. Onward to the future.