My daughter – age 14 – is all about Instagram. It’s her primary source of entertainment: if she’s on her phone, she’s likely looking at memes or laughing at silly posts made by her friends. It’s also the main way she communicates with them, as they use its messaging service much more than things like texting or video chat.

In its early days, the internet was often spoken of as a free marketplace of ideas, where everyone’s views and thoughts could be shared and compete on an equal footing. Today it’s an essential tool for accessing information and services, but its value as a vehicle of civic engagement and debate has in many ways declined.