Final answer:
The author makes the connection between summertime and creativity in the book by implying that unstructured summer time allows for more thinking and imagination. This is supported by the idea that in the past, individuals had more opportunities for creative behavior in their daily lives.
Step-by-step explanation:
The author makes the connection between summertime and creativity in the book 'Doing Nothing is Something' by implying that since there are no scheduled activities during the summer, there is more open time for thinking and imagination. This is evidenced by the fact that in primeval society, individuals had more opportunities for creative behavior as they spent part of each day making or shaping something by hand. The author argues that recent cultural developments have reduced the incentives and opportunities for creative behavior, making summertime a valuable space for fostering creativity.