A hallmark of self-regulation is the ability to resist the temptation of an immediate reward in favor of a larger reward later, known as delay of gratification. A classic paradigm for assessing this ability was developed by Mischel (Mischel, Shoda, & Rodriguez, 1989) for use with young children. He examined whether children would choose a small reward (one marshmallow) sooner over a larger reward (two marshmallows) later. Children’s behavior fell into two clusters: (a) they ate the treat almost immediately (low delayers), or (b) they waited for some amount of time in an attempt to gain two treats (high delayers). These two different patterns of behavior provide an example of individual differences in self-control that can be detected and measured in early childhood (Mischel et al., 1989). However, how did these individuals fare in their self-control ability later in life?