What are the chances that, from an outside perspective, that we are just one variety of life form on the planet? Sure, they can make distinctions about which v

What are the chances that, from an outside perspective, that we are just one variety of life form on the planet? Sure, they can make distinctions about which variety of us (e.g. humans, not dogs) have the most intelligence or something--but perhaps from an outside perspective, we all started from the same spontaneous event or whatever, and we're just many, many generations of that same lifeform. In other words, maybe we're just being "racist," sort-of. As an aside, is this a named theory or something? I'd like to read about it.