Excerpt from this article:
In the grand context of human history, what we were doing was outrageous. Nearly everyone who has ever lived would only trust someone they knew to look after their children. But today it does not seem so unusual. People seem to have steeply increased their propensity to trust strangers. We rent out our homes to them, we get into their cars, we meet them for a drink on the understanding that we may be having sex later on (so I hear).
In theory at least, this is a good thing. Social scientists have compiled a mountain of evidence that what they call “social trust” – trust in fellow citizens you haven’t yet met – is the secret to a successful society. Countries with higher trust in strangers have higher economic growth, less corruption, and happier citizens. They have lower suicide rates, less chronic illness and fewer fatal accidents (the economist John Helliwell suggested that if France was as trusting as Norway, its traffic fatalities would be halved). Politicians often debate the best way to increase productivity or improve education. Few propose policies to raise trust. But maybe our smartphones are already providing the answers.