Literary themes understood by all people regardless of their background or the time they live in are.

1) Love and relationships: The theme of love and relationships is universal and transcends time and cultural barriers. Whether it is romantic love, familial love, or platonic love, people from all backgrounds can relate to the complexities, joys, and challenges that come with human connections.

2) Loss and grief: The experience of loss and grief is a fundamental aspect of the human condition. Regardless of one's cultural background or the time they live in, people have all felt the pain of losing someone or something significant, and literature often explores this theme to delve into the depths of human emotions and the process of healing.

3) Coming of age: The theme of coming of age is prevalent in literature throughout history and cultures. It reflects the universal journey of individuals transitioning from childhood to adulthood, navigating the challenges, self-discovery, and growth that come with it.

4) Good vs. evil: The battle between good and evil is a theme that resonates across time and cultures. Literature often explores the moral dilemmas faced by characters and the choices they make, providing insights into the complexities of human nature and the universal struggle between right and wrong.

5) Identity and self-discovery: People from all backgrounds grapple with questions of identity and self-discovery throughout their lives. Literature addresses the search for one's purpose, the conflicts between societal expectations and personal desires, and the journey to understand oneself, making this theme relatable to everyone.

6) Power and corruption: The theme of power and corruption is universally understood as humans have always struggled with its allure and the consequences it brings. Whether it's political power, societal influence, or personal ambitions, literature often explores the moral implications and the impact on individuals and society when power is abused.

7) Redemption and forgiveness: The universal desire for redemption and the ability to forgive are powerful themes in literature. Regardless of cultural backgrounds, people understand the need for redemption, the hope for second chances, and the emotional journey of forgiveness, both for oneself and others.

8) Human mortality: The inevitability of death is a theme that transcends time and cultural boundaries. Literature often contemplates the brevity and fragility of human life, encouraging readers to contemplate their existence and the legacy they leave behind.

9) Struggle for freedom and justice: The quest for freedom, justice, and equality is a theme explored in literature across different time periods and cultures. Whether it is fighting against oppressive systems, advocating for civil rights, or challenging societal norms, literature reflects the universal yearning for fairness and the enduring struggle for liberty.

10) Nature and the environment: The theme of nature and the environment connects people across time and cultural differences. Literature often celebrates the beauty and power of nature, highlights the interdependence between humans and their natural surroundings, and explores the consequences of environmental degradation, making it a universally understood and appreciated theme.

There are several literary themes that can be understood by people regardless of their background or the time they live in. These themes often resonate with universal human experiences and emotions. Here are five such themes:

1. Love: The theme of love is a universal concept that explores various aspects such as romantic love, familial love, or friendship. It has been a central theme in literature across different cultures and time periods.

2. Death and Mortality: The inevitability of death is a theme that touches everyone's lives. Exploring death in literature helps individuals contemplate their mortality and grasp the fragility and transient nature of life.

3. Good vs. Evil: The age-old theme of good versus evil explores the moral struggle between forces of righteousness and malevolence. This theme resonates with people across cultures and has been a fundamental part of storytelling throughout history.

4. Coming of Age: The journey from childhood to adulthood, and the challenges and self-discovery that accompany it, is a theme found in numerous literary works. This theme explores universal experiences of growth, self-awareness, and transformation.

5. Freedom and Oppression: The quest for freedom and the struggle against oppression is a theme that transcends time and place. Literature often delves into the injustices individuals face and explores the pursuit of liberty and autonomy.

While these themes may be interpreted differently based on cultural or personal backgrounds, their underlying concepts can be understood by most people, regardless of their context or the era they live in.