Happiness tends to decline in early adulthood due to mounting pressures, but meaning increases over time, leading to long-term fulfillment. The period from the early 50s to around 70 is often marked by a "happiness bonanza," particularly for those who nurture relationships rather than relying solely on worldly success. Interestingly, those who achieve significant success before 70 may find themselves less happy later in life if they lack strong personal connections.