I am still trying to get my head around the details of the Anthropic Principle, but my understanding of it is that we need to keep into account that we are an integral part to the universe as observers. The universe needs us as much as we need it, as we bring it into existence through the act of observation.

A logical argument against this notion would be - if we are so important as observers, then how would the universe have existed before we came into being? Well the Participatory Anthropic Principle states that since we can observe the photons that reach us from when the big bang occurred, we are essentially bringing it into existence. Its a self consistent loop. We are here as part of the action and not just along for the ride.

My problem with this is that it is centred around humans and our intelligent understandings of the universe. So basically, if we never came into existence, neither would anything we see around us. If we never evolved onto land and were intelligent underwater creatures, according to this principle, the universe wouldn’t exist.