How do remote tribes that have no new genetic material for thousands of years not die out because of inbreeding?

Rem ote tribes that have no new gen etic material for thousands of years can avoid dying out due to in bre eding by pract icing cons angu inity , which is the practice of marry ing close relatives . This can help to maintain gen etic divers ity within the tribe and prevent the negative effects of in bre eding , such as increased risk of gen etic dis orders and reduced fert ility . Additionally , remote tribes may have limited options for marriage due to their isol ation , which can lead to the practice of cons angu inity . However , it is important to note that cons angu inity can also have negative effects on the health and well - be ing of the tribe , and it is not a long - term solution for maintain ing gen etic divers ity . </s>