Final answer:
Archaeologists are divided regarding the theory that Cactus Hill could be where the first North Americans lived due to ongoing archaeological debates about the Clovis culture and the evidence of earlier pre-Clovis cultures.
Step-by-step explanation:
Not all archaeologists agree on the theory that Cactus Hill may be the home of the first people of North America. This disagreement stem from the continuous discovery of new archaeological evidence that challenges the Clovis first paradigm. Clovis culture, identified with distinct stone spearheads, was once thought to represent the first human inhabitants of the Americas, arriving via the Bering Land Bridge. However, newer findings suggest the presence of pre-Clovis cultures with human activities dating back further than 13,200 years before present. Disputes arise over the interpretation of artifacts as well as the accuracy of dating methods as they reach further back in time, particularly for sites yielding dates of 50,000-33,000 BCE, which some believe to be not man-made but natural formations.
There is also a growing consensus among some historians and archaeologists that both overland and coastal migrations occurred, with migration happening over an extended period of time. This is supported by linguistic evidence showing differences between indigenous coastal and interior languages. Nonetheless, theories such as the Solutrean hypothesis and those proposing even earlier dates for human presence in the Americas, remain controversial within the scientific community.