There is an imperative force internal to evolution - self replication. Information must propagate (replicate) from the past into the future. But this leads to competition for resources, and hence drives evolution.

How would you know if a higher dimensional being was directing it? We can't easily detect something outside our current physical dimensions.

We know that for our math to work there have to be a number of higher dimensions. I think it's more logical to believe this came from something instead of from nothing.