From a purely biological and evolutionary standpoint, the primary 'purpose' of any living organism, including humans, is survival and reproduction.
Evolutionary biology posits that life forms exist due to successful adaptation and propagation of their genes. Traits that enhance survival, mate acquisition, and offspring rearing are favored by natural selection, leading to their prevalence in subsequent generations. While humans exhibit complex behaviors far beyond mere primal drives, our fundamental biological machinery and instincts are deeply rooted in this imperative. Our capacity for cooperation, innovation, and even empathy can be viewed through an evolutionary lens as strategies that enhanced group survival and reproductive success in ancestral environments. This perspective doesn't negate higher purposes but rather frames them within a foundational biological context. It suggests that while we may seek meaning in art, love, or discovery, these pursuits are enabled by and, in some cases, indirectly serve the underlying biological 'purpose' of perpetuating life.