R-selection is like having 1000 offsprings, whereas k-selection is like having only 1.
I heard a variation applied to humans in a psychology textbook about how abused humans are more likely to have more kids than unabused and cannot find the name of this theory
That’s the life history theory.
The following review has some more in-depth information about this theory in the context of psychology: https://royalsocietypublishing.org/doi/10.1098/rstb.2015.0151#d3e406