The idea of "self-defense" has indeed become more complicated in the 21st century, as it has been shaped by various social, legal, and technological developments. Some of the factors that have contributed to this complexity are:
Advancements in weaponry: The widespread availability of firearms and other lethal weapons has changed the nature of self-defense. While people have always had the right to protect themselves from harm, the ability to do so with deadly force has become easier and more prevalent.
Increased urbanization: As more people live in densely populated urban areas, the line between self-defense and aggression can become blurred. For example, in cases of "stand your ground" laws, individuals may use lethal force in what they perceive to be self-defense, but which others view as unnecessary or disproportionate.
Racial tensions and social inequality: In some cases, self-defense has become intertwined with issues of race and social inequality. For example, people of color may face greater suspicion and scrutiny when invoking the right to self-defense, leading to different outcomes in legal cases.
Technological advancements: The rise of social media and other digital technologies has created new avenues for harassment and threats, which may require new forms of self-defense. For example, online harassment or cyberbullying may necessitate legal action or other protective measures.
Overall, the idea of self-defense has become more complex in the 21st century, as it is shaped by a variety of legal, social, and technological factors. While the right to protect oneself from harm remains fundamental, it must be balanced against other rights and considerations, such as public safety and social justice.