There have been countless different dominate species before humans and dinosaurs and before that, creatures that ruled the seas as land was inhabitable. There is no way we can see if Earth has previously had intelligent life more or less than we are today before the Earth recycle
Humans have been around for 0.007% of the time Earth has existed, around 250,000 years. The Earth has been bio geologically recycling since its existence, allowing different species to thrive. The Earth will be able to hold humans for so long until another species will dominate.