After studying this chapter, the reader will be able to:

Explain the theory of inclusive fitness.

Provide three empirical examples that illustrate the importance of genetic relatedness for helping.

Describe two studies that suggest that genetic relatives make a difference between life and death.

Analyze why maternal grandmothers would invest more than paternal grandfathers in their grandkids.

Explain, from an evolutionary perspective, why families might form.

Summarize the three major sources of conflict within families.