The Broaden-and-Build Theory in Positive Psychology emphasizes that experiencing positive emotions can lead to an increase in overall well-being. These emotions enable individuals to pursue upward trajectories in their lives, enhancing their mental and emotional states. It implies that people who cultivate positivity not only benefit personally but also have the potential to influence those around them positively.

In Susan C. Young's book, "The Art of Body Language," she discusses how understanding and optimizing non-verbal communication can enhance one's ability to create a positive impact in various situations. The insights from the Broaden-and-Build Theory align with the idea that positive individuals are likely to engage more effectively with others, thereby spreading positivity and improving their social environments.