The open source movement enabled so much in computing, including the collaborative building of libraries -- that is, building blocks of code that developers could combine together to build applications. But as these applications grew to massive scale, those libraries ended up being somewhat asymmetrical for "nights-and-weekend" developers (compared to say, the disproportionate resources of a large company with billions of users and big data). Blockchains, however -- enabled by cryptotokens that align incentives among stakeholders -- shift open source development from libraries, to the creation of shared, open, permissionless services. Instead of being siloed and repetitively produced as if from the industrial factory era, any smart contract developed on Ethereum becomes a shared service that can interact with any other service... incentivizing developers to improve on existing services, build on top of them, and enable combinatorial innovation at greater scale than ever before. But if decentralized networks are to win the third era of the internet, how will we resolve challenges such as single-purpose services (another form of consolidation), community conflicts, and other issues? In this video, freelance software engineer (and blockchain app developer) and writer (and urban watcher) Devon Zuegel guest-interviews a16z crypto partners Denis Nazarov and Jesse Walden, the co-founders of Mediachain Labs (which was acquired by Spotify in 2017). They draw on their past experiences leading open source development of a decentralized media attribution protocol for connecting creators to their audience, and what the implications of "services vs. libraries" could be for creatives now. And what about identity, stablecoins and crypto finance, and more? Finally, they extend their previous analogy of cities and network effects and how it fits the idea of libraries vs. services in crypto. *** The views expressed here are those of the individual AH Capital Management, L.L.C. (“a16z”) personnel quoted and are not the views of a16z or its affiliates. Certain information contained in here has been obtained from third-party sources, including from portfolio companies of funds managed by a16z. While taken from sources believed to be reliable, a16z has not independently verified such information and makes no representations about the enduring accuracy of the information or its appropriateness for a given situation. This content is provided for informational purposes only, and should not be relied upon as legal, business, investment, or tax advice. You should consult your own advisers as to those matters. References to any securities or digital assets are for illustrative purposes only, and do not constitute an investment recommendation or offer to provide investment advisory services. Furthermore, this content is not directed at nor intended for use by any investors or prospective investors, and may not under any circumstances be relied upon when making a decision to invest in any fund managed by a16z. (An offering to invest in an a16z fund will be made only by the private placement memorandum, subscription agreement, and other relevant documentation of any such fund and should be read in their entirety.) Any investments or portfolio companies mentioned, referred to, or described are not representative of all investments in vehicles managed by a16z, and there can be no assurance that the investments will be profitable or that other investments made in the future will have similar characteristics or results. A list of investments made by funds managed by Andreessen Horowitz (excluding investments and certain publicly traded cryptocurrencies/ digital assets for which the issuer has not provided permission for a16z to disclose publicly) is available at https://a16z.com/investments/. Charts and graphs provided within are for informational purposes solely and should not be relied upon when making any investment decision. Past performance is not indicative of future results. The content speaks only as of the date indicated. Any projections, estimates, forecasts, targets, prospects, and/or opinions expressed in these materials are subject to change without notice and may differ or be contrary to opinions expressed by others. Please see https://a16z.com/disclosures for additional important information.