The post below is an open letter to European citizens, lawmakers and regulators, from our founder and Web inventor Sir Tim Berners-Lee, Professor Barbara van Schewick, and Professor Larry Lessig. Join the conversation in the comments below or on Twitter using #savetheinternet or #netneutrality.

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Network neutrality for hundreds of millions of Europeans is within our grasp. Securing this is essential to preserve the open Internet as a driver for economic growth and social progress. But the public needs to tell regulators now to strengthen safeguards, and not cave in to telecommunications carriers’ manipulative tactics.

We are so close. In October, the European Parliament voted on network neutrality rules for the European Union. Now regulators are writing guidelines to determine how the law will be applied in practice. These guidelines could secure net neutrality in Europe – if regulators use them to close potential loopholes in the law.