Do libertarians believe in survival of the fittest?

Libertarians generally do not explicitly embrace the concept of "survival of the fittest" as a guiding principle for society, as this phrase is often associated with social Darwinism, which can imply a justification for inequality and lack of support for the vulnerable. Instead, libertarians advocate for individual freedom, personal responsibility, and minimal government intervention, believing that a free market allows individuals to thrive based on their abilities and efforts. They often argue that voluntary cooperation and mutual aid are essential for a prosperous society, rather than a strict competition where only the strongest survive.