I'm enjoying The Ideas That Make Us programmes on BBC Radio 4, though struck again (like the series on Noise) by how they are shaped by a materialism and power agenda.

So, concludes Bettany Hughes in prog 1, ideas are born in our synapses. Is that so obvious - how an idea might spring from an electro-chemical exchange? Why isn't that questioned?

Or in prog 2, she thinks about fame as desirable because it allows for the successful exercise of power. Maybe fame is a misdirected longing for the eternal - which is what I think Plato thought.

Maybe the agenda will shift as the series progresses...