[Does so]

I would think that it is more than just a dozen factors that contributed to the success of the Earth.

We are alone...

[dhs12345]

Then that makes us pretty special.

[dhs12345]

There is another component — time.

Other beings may have existed or will exist but we weren’t around or will not be around when they reach the level to be able to communicate across space.

Also, until we can travel across the vast distances between stars within a fraction of a human lifetime, we will never know and will forever have to speculate.