The second law of karma, emphasizing its fast-growing nature, resonates profoundly in the modern world, a realm where interconnectivity and immediacy have become defining features. This law, stating that the results of skillful (positive) and unskillful (negative) actions are swiftly realized, can be observed through various lenses in contemporary society.

1. Immediate Effect on Another Being: In today's hyper-connected world, actions, whether skillful or unskillful, have an almost instantaneous impact on others. The rapid exchange of information and the ability to communicate across great distances in real-time mean that our actions can affect people across the globe almost as soon as they are enacted. For instance, a kind word or a harmful comment on social media can instantly uplift or distress someone thousands of miles away. This immediacy magnifies the responsibility of each individual to be mindful of their actions, as the direct consequences on others are more immediate and far-reaching than ever before.
2. Propagation through the Physical and Social Environment: Modern advancements in technology and globalization have led to a situation where actions are not just confined to their immediate environment but can ripple through the world. A decision made by a corporation or an individual can influence the environment, economies, and societies on a global scale. For example, environmentally conscious practices can contribute to global sustainability, whereas neglectful actions can exacerbate climate change and its associated global impacts. In the social realm, movements for justice or equality can spread rapidly, inspiring change and awakening collective consciousness on a global level.
3. Effect of Habituation: In the realm of personal development, the law of karma underscores the importance of habituation. When one derives satisfaction from an action, whether skillful or unskillful, it tends to become a habit. In a world where gratification can be quickly obtained, often with just a click, the tendency to repeat actions that provide immediate satisfaction is high. This can lead to positive cycles of generosity and compassion if one is inclined towards skillful actions, or negative cycles of greed, anger, and delusion if one leans towards unskillful actions. The modern world, with its myriad of instant gratification opportunities, highlights the importance of mindful practice in shaping one's habitual tendencies.
4. Effect Like the Cause: The interconnectedness of today's world also means that actions tend to create ripple effects that mirror their nature. Skillful actions that promote well-being and harmony can inspire similar actions in others, creating a positive feedback loop. Conversely, unskillful actions that cause harm or discord can incite further negativity, leading to a cycle of suffering. This mirrors the Buddhist understanding of karma, where the nature of the cause is reflected in the effect.

The second law of karma's emphasis on the rapid growth and fruition of actions is highly relevant in the modern world. The immediate impact on others, the widespread propagation of actions, the formation of habits based on these actions, and the reflective nature of the consequences all highlight the profound responsibility each individual holds. In an age where actions can have global repercussions, the mindfulness and intention behind every action become crucial for personal and collective well-being. This calls for a conscious effort to cultivate skillful actions and to understand deeply the interdependent nature of our existence.