Yes, all humans are genetically related to all other humans. We are a single species, Homo sapiens, and we share a common ancestry. This means that all humans have a common genetic heritage that traces back to a relatively small population of our early human ancestors.
Modern genetic research has shown that the genetic variation among humans is relatively small compared to other species. Despite the diversity in physical appearances and cultural practices, the genetic differences among humans are quite minor.
Genetic studies have also found that humans originated in Africa, and all present-day human populations can trace their ancestry back to African ancestors who lived there around 200,000 years ago. As groups of early humans migrated out of Africa and spread across the globe, they carried with them a subset of the genetic diversity present in the original population.
Over time, different populations have experienced some genetic isolation and accumulated slight genetic differences due to various factors such as geographic barriers, cultural practices, and natural selection. Still, these differences are relatively small compared to the overall genetic similarity that unites all humans.
In summary, every human being on Earth shares a common genetic heritage, and we are all part of one large human family. The concept of genetic relatedness highlights the unity of our species and emphasizes our shared evolutionary history.