Not following. Iguanas did evolve. We also evolved. Those that evolved to be 'more like iguanas' actually happened - we call them 'iguanas' and they are lizards. Not doing too well.

The fact is a certain brainy old-world ape has taken over the biosphere. Because evolution gave them the biological tools to do so. That's what evolution does.

We'd have to propose something different from evolution, to get a different result.