Survivorship bias means that the only objects available for comparison are ones that bias the comparison. For example, the brick buildings from 2,000 years ago

Survivorship bias means that the only objects available for comparison are ones that bias the comparison. For example, the brick buildings from 2,000 years ago were built way better, because look at this brick building still standing that was built 2,000 years ago, look how great it is! Of course, the bad brick buildings built 2,000 years ago can't be found because they crumbled a long time ago.