"This pamphlet is a review of the research literature published in the last decade related to the four themes in the title. The authors use these surveys to discuss historical shifts in the way researchers have approached the themes, to point out gaps in the literature, and in some cases to advocate for future research directions. The intended audience is active researchers working with these themes, and I think it would help this group move their research agendas forward." (Brian P. Katz, Maa Reviews, maa.org, October, 2016)