Final answer:
The primary source from which most people get their dogs isn't provided in the references. Dogs have historically been acquired from variety of sources including breeders and shelters. The domestication of dogs from wolves has been a complex process, heavily influenced by the needs and practices of human societies.
Step-by-step explanation:
The source from which the highest percentage of people get their dog varies significantly across different regions and over time. It isn't explicitly stated in the provided reference information. However, generally, dogs have been sourced from breeders, shelters, rescues, and private individuals. Currently, there is a strong movement towards adopting dogs from shelters and rescue organizations to help reduce the number of unwanted animals. Historically, dogs were often domestically bred or would assimilate themselves into human communities.
The domestication of dogs from wolves through selective breeding has resulted in a wide variety of breeds with different characteristics. This process started thousands of years ago and has allowed humans to mold canine abilities to suit various functions like hunting, guarding, and companionship. The nature of the mutual relationship between dogs and humans has evolved with cultures placing different values on the roles that dogs play in society.