, titled "Political Obligation in Its Historical Context: Essays in Political Theory" | Cambridge Univ Pr, October 1, 1980, cover price $65.00 | also contains Political Obligation in Its Historical Context: Essays in Political Theory
| About this edition:
What sort of commitments do human beings have good reason to acknowledge to one another and to the social units (family, tribe, state) to which they belong?
| Powerkids Pr, August 1, 2015, cover price $8.25 | About this edition:
Describes some of the ways in which people use science, technology, engineering, and mathematics at a zoo, including animal diets, habitat and exhibit design, and energy needs.
| Powerkids Pr, August 1, 2015, cover price $23.60 | About this edition:
Zoos are places where STEM comes to life, including the science of caring for animals, the technology used in zoo security, engineering that keeps habitats habitable, and the math used to calculate ticket sales.