To review: About half of happiness is genetically determined. Up to an additional 40 percent comes from the things that have occurred in our recent past — but that won’t last very long.

That leaves just about 12 percent. That might not sound like much, but the good news is that we can bring that 12 percent under our control. It turns out that choosing to pursue four basic values of faith, family, community and work is the surest path to happiness, given that a certain percentage is genetic and not under our control in any way.

The first three are fairly uncontroversial. Empirical evidence that faith, family and friendships increase happiness and meaning is hardly shocking. Few dying patients regret overinvesting in rich family lives, community ties and spiritual journeys.

Work, though, seems less intuitive. Popular culture insists our jobs are drudgery, and one survey recently made headlines by reporting that fewer than a third of American workers felt engaged; that is praised, encouraged, cared for and several other gauges seemingly aimed at measuring how transcendently fulfilled one is at work.

Those criteria are too high for most marriages, let alone jobs. What if we ask something simpler: “All things considered, how satisfied are you with your job?” This simpler approach is more revealing because respondents apply their own standards. This is what the General Social Survey asks, and the results may surprise. More than 50 percent of Americans say they are “completely satisfied” or “very satisfied” with their work. This rises to over 80 percent when we include “fairly satisfied.” This finding generally holds across income and education levels.

This shouldn’t shock us. Vocation is central to the American ideal, the root of the aphorism that we “live to work” while others “work to live.” Throughout our history, America’s flexible labor markets and dynamic society have given its citizens a unique say over our work — and made our work uniquely relevant to our happiness. When Frederick Douglass rhapsodized about “patient, enduring, honest, unremitting and indefatigable work, into which the whole heart is put,” he struck the bedrock of our culture and character.

I’m a living example of the happiness vocation can bring in a flexible labor market. I was a musician from the time I was a young child. That I would do it for a living was a foregone conclusion. When I was 19, I skipped college and went on the road playing the French horn. I played classical music across the world and landed in the Barcelona Symphony Orchestra.