A meta-study of ~200 papers and ~275,000 participants found that happy individuals are successful across life domains including marriage, friendship, income, work performance, and health. The happiness-success link exists not only because success makes people happy, but also because positive affect leads to success: it is likely a cause of many of the desirable characteristics, resources, and successes correlated with happiness.
REFERENCE — Lyubomirsky S, King L, Diener E. The benefits of frequent positive affect: does happiness lead to success? Psychol Bull. 2005 Nov;131(6):803-55. doi: 10.1037/0033-2909.131.6.803. PMID: 16351326.
For a more in depth summary see this video.
https://youtu.be/ms33-0GLNF0?si=FKS1czxjrBJQtVwl