It’s amazing how Alice Roosevelt, daughter of President Theodore Roosevelt, and her first cousin Eleanor, renowned wife of Franklin Delano Roosevelt (FDR), sustained a relationship for more than six decades, given their polar-opposite dispositions. Blood is not necessarily thicker than water, and yet these two disparate personalities—the former, a socialite and senator’s wife, and the other, a political force and humanitarian in her own right, do not sever ties. Eleanor and Alice: Conversations Between Two Remarkable Roosevelts, Ellen Abrams’s new play about that relationship, deals with these celebrated women’s close camaraderie from childhood through FDR’s death.