In a world where it takes just seconds (or nanoseconds) to connect, contact, communicate, and comment in our shared online community, what will you show the world? In the 86,400 seconds that make up your day, what contributions will you make to the online global forum? Will your online interactions yield positive outcomes? Will they promote digital peace or digital peril? In Good Digital Citizen: Everyday Ethics for an Intentional Digital Existence, Kori Kastell navigates the complex landscape of our increasingly digital world, offering a thoughtful exploration of the ethical challenges and opportunities that come with technological advancements. As we stand at the dawn of the Fifth Industrial Revolution, where human strengths are expected to harmonize with innovations like AI and IoT, this book serves as a crucial guide for navigating the digital age with integrity and intention. Drawing on historical and philosophical insights, the author explores how principles from ancient up to present-day thinkers can help us address these modern ethical dilemmas. Good Digital Citizen provides practical steps for managing information overload, setting boundaries for digital engagement, and maintaining emotional well-being through practices like "Stoic scrolling." Kastell emphasizes the importance of truth and integrity in online interactions, urging readers to fact-check information and engage in empathetic communication, and highlights the need for heightened awareness and transparency around data privacy and user rights to promote greater digital justice. By embracing everyday ethics and striving for digital peace, we can create a more just, connected, and harmonious world as we move into the Fifth Industrial Revolution. The mission is yours, Digital Citizen, if you choose to accept it.