# Why I used to prefer permissive licenses and now favor copyleft

<https://vitalik.eth.limo/general/2025/07/07/copyleft.html>

- Host: [vitalik.eth.limo](https://links.thingelstad.xyz/hosts/vitalik.eth.limo/)
- Saved: July 16, 2025 (2025-07-17T03:18:43Z)
- Record: https://links.thingelstad.xyz/links/0b843ec6977d/
- JSON: https://links.thingelstad.xyz/links/0b843ec6977d.json

## Facts

- Kind: [Page](https://links.thingelstad.xyz/kinds/page/)

## Same host

- [What I would love to see in a wallet](https://links.thingelstad.xyz/links/4501cfbd0602/) (vitalik.eth.limo, December 3, 2024)
- [Scaling Ethereum L1 and L2s in 2025 and beyond](https://links.thingelstad.xyz/links/ec833f7988ec/) (vitalik.eth.limo, January 26, 2025)
- [Reasons to have higher L1 gas limits even in an L2-heavy Ethereum](https://links.thingelstad.xyz/links/a035a964eb1f/) (vitalik.eth.limo, February 18, 2025)
- [Why I support privacy](https://links.thingelstad.xyz/links/54c2c60e79a0/) (vitalik.eth.limo, April 17, 2025)
- [My response to AI 2027](https://links.thingelstad.xyz/links/84bd0544b3ca/) (vitalik.eth.limo, July 16, 2025)

## Saved the same week

- [Ten Years Indie - 512 Pixels](https://links.thingelstad.xyz/links/5a10d3fe9076/) (512pixels.net, July 16, 2025)
- [The AI-Native Software Engineer - by Addy Osmani - Elevate](https://links.thingelstad.xyz/links/1bcb4034b715/) (addyo.substack.com, July 16, 2025)
- [why are we lying to young people about work? - by Maalvika](https://links.thingelstad.xyz/links/cb1d05f7c95b/) (maalvika.substack.com, July 16, 2025)
- [If it cites em dashes as proof, it came from a tool. § Scott Smitelli](https://links.thingelstad.xyz/links/02adb0834261/) (scottsmitelli.com, July 16, 2025)
- [I still care about the code](https://links.thingelstad.xyz/links/e9b183c4f0a6/) (martinfowler.com, July 16, 2025)

## Elsewhere

- Wayback Machine: https://web.archive.org/web/*/https://vitalik.eth.limo/general/2025/07/07/copyleft.html