What are Haplogroups? Human Genetics Explained

Just what exactly are human haplogroups? Today let's discuss an integral part of human genetics, that I don't think I've explained in quite as much detail as I would like, including the emergence and spread of paternal and maternal haplogroups and their relation to race, ethnicity, language and other defining factors of modern human communities.

Please let me know your thoughts on the quirks of haplogroups and human genetics and which aspect of humanity best defines our groups and sub-groups. As always thanks for watching!

Sources:
http://atlas.xyvy.info/country-nation...
http://www.kerchner.com/haplogroups-y...
https://dna-explained.com/2013/06/23/...
https://www.familytreedna.com/underst...