“A few days after arriving at the Yale School of Drama from Kenya in 2009, Lupita Nyong’o found herself understudying in a professional production of Eclipsed, Danai Gurira’s harrowing play about women in the second Liberian civil war.” So when, following her Oscar for 12 Years a Slave, the Public Theater offered her a chance to return to the stage, she had no doubt about the script she wanted.