Feminists of my mother's generation argued that both mom and dad should work a little less and each do some of the household chores. My parents, for example, split everything 50/50. Even though my father is a terrible cook, he still made dinner exactly half the time.
The most active period of the witchcraft trials coincides with a period of lower than average temperature known to climatologists as the "little ice age"...In a time period when the reasons for changes in weather were largely a mystery, people would have searched for a scapegoat in the face of deadly changes in weather patterns. 'Witches' became target for blame because there was an existing cultural framework that both allowed their persecution and suggested that they could control the weather.
Economists typically think that your happiness goes up as you get more money, but the more you have, the less each additional dollar matters. This means that you value money most in times when you have less income and more expenses.
No one likes doing chores. In happiness surveys, housework is ranked down there with commuting as activities that people enjoy the least. Maybe that's why figuring out who does which chores usually prompts, at best, tense discussion in a household and, at worst, outright fighting.
Every time you have a carrot instead of a cookie, every time you go to the gym instead of going to the movies, that's a costly investment in your health. But how much you want to invest is going to depend on how much longer you expect to live in the future, even if you don't make those investments.
Economics works great for planning your life when you don't have a work passion, since we tend to assume that your job delivers only money and you trade off job hours with leisure hours. If you think your job will just be a job, pick one that pays well per hour and leaves you some time off, even if the activity of the job is boring.
The basic idea that incentives can be used to motivate behavior is a powerful one. It works for employees, and it has a clear place in parenting, as anyone who has tried to potty-train a recalcitrant toddler with sticker rewards knows.