Black men were emasculated and stripped of their rights as human beings during slavery in the United States. When their wives endured sexual assault at the hands of slave masters, many black men were not allowed to step in and defend them and those who did faced severe punishment. You could do a thesis on how African-American men have struggled to reclaim their masculinity since the end of slavery, and what social and political factors have stood in the way of doing this.
Another idea is to examine women's role in Latin America as it relates to employment. Myth of the Male Breadwinner, Domesticas, What's Love Got to Do With It?: Sex, Tourism and Desire in the Dominican Republic, and Sex and the Revolution, which deals with how gender relations were appropriated under Cuba's socialist rule, are some good books to read on this issue. Talk about the social factors which led to the increase in employment among Latin-American women, and how this affects their families and Latin America in general.
In some societies, child labor is an important economic asset for families. For example, in the book Fewer Men, More Babies: Sex, Family and Fertility in Haiti, author Timothy Schwartz states that in some areas of rural Haiti, parents believe that more children means more people to contribute to the household. You could do a study on the factors which contribute to the importance of child labor in select developing countries, and what kind of effect this has on the children themselves.
You could complete a thesis on the history of and current state of Afro-Mexicans both in Mexico and in America. Discuss how slavery originated in Mexico and why the academic scholarship on Afro-Mexicans has been scant compared to research that has been done on blacks in other parts of Latin America, such as Cuba, Brazil and Puerto Rico. Also interview some Afro-Mexicans in America and discuss their experiences to determine whether they experience similar or different treatment from both non-Afro-Mexicans, African-Americans and white Americans.