why "are" is used in this sentence

[ehsanshekari]

Hello.
I can't understand why the word "are" is used in the below sentence. I think
it's redundant.

Second, it is more amenable to scientific development than are approaches based on human behavior or human thought.

thanks.

[Rover_KE]

It means

'It is more amenable to scientific development than approaches based on human behavior or human thought are (amenable to scientific development)'.

Let's simplify this sentence, eh?

'It is more amenable to development than other approaches are.'

When the other approaches are specified or enlarged upon - lengthening the sentence - it is more stylish to bring the are forward.

We could easily say, in our simplified sentence,

'It is more amenable to development than are other approaches.'

Rover

EDIT: You're right: it's probably redundant anyway.