Integrating spider-like centaur aliens with small hive families into your campaign adds a unique and intriguing dynamic. Here’s how to incorporate these elements:

### Worldbuilding with Spider-like Centaur Aliens

**1. Alien Physiology and Society:**

- **Appearance:** Describe the aliens as having the upper body of a humanoid and the lower body of a spider. Include details like multiple eyes, mandibles, and possibly silk-producing abilities.

- **Hive Families:** Each alien belongs to a small hive family, which functions as a close-knit social unit. Hive families might be matriarchal or led by a queen.

**2. Alien Culture:**

- **Beliefs and Practices:** The alien religion could be centered around a web of life philosophy, viewing the universe as interconnected and emphasizing balance and harmony.

- **Sacred Sites:** Sacred sites could be massive, intricately woven web structures, which serve as places of worship and community gathering.

**3. Planetary Ecosystem:**

- **Habitats:** The planet’s environment might include dense forests or caves suitable for web-building. The climate could be humid and warm, ideal for the spider-like aliens.

- **Flora and Fauna:** Design unique flora and fauna, some of which the aliens use for food, materials, or religious purposes. Some plants or animals might be sacred or taboo.

### Plot and Conflict with Religious and Social Dynamics

**4. Initial Tensions:**

- **Territorial Disputes:** Initial human settlement might encroach on alien territory, particularly sacred sites, leading to conflict.

- **Cultural Misunderstandings:** Human actions might inadvertently disrespect alien customs, such as damaging webs or harvesting sacred plants.

**5. Escalating Conflicts:**

- **Religious Zealots:** Alien zealots might see humans as a threat to their religious way of life and try to expel or convert them.

- **Internal Strife:** Within the human community, factions might disagree on how to interact with the aliens, leading to internal tensions.

**6. Diplomatic and Religious Intrigues:**

- **Negotiations:** Diplomatic efforts could involve tense negotiations with alien hive leaders, balancing respect for alien customs with human needs.

- **Religious Syncretism:** Attempts to find common ground between human and alien beliefs might result in new hybrid practices or alliances.

### Characters and Factions with Complex Interactions

**7. Diverse Characters:**

- **Human Leaders:** Include a range of human leaders, from pragmatic survivalists to idealists seeking peaceful coexistence.

- **Alien Leaders:** Develop key alien characters, such as a wise matriarch, a zealous cleric, and a curious diplomat open to human ideas.

**8. Factions:**

- **Human Factions:** Create factions like secularists, religious refugees clinging to old beliefs, and pragmatists advocating for compromise.

- **Alien Factions:** Introduce factions within the alien society, such as conservative hive families, reformists, and radicals opposed to humans.

### Technology and Resources with Religious Contexts

**9. Alien and Human Technology:**

- **Sacred Technology:** Alien technology, possibly based on biochemistry and web-building, might have religious significance.

- **Human Technology:** Certain human technologies might be seen as disruptive or miraculous, leading to conflict or opportunities for cooperation.

**10. Resources:**

- **Resource Scarcity:** Tension over resources like water, food, or minerals could drive the plot, especially if these are sacred or taboo to the aliens.

- **Unique Resources:** Introduce unique resources, such as alien silk, which might be valuable to humans for building or trade.

### Story Hooks with Religious and Social Dimensions

**11. Story Hooks:**

- **Prophecies and Omens:** Alien prophecies or omens about the arrival of humans could add a mystical element to the plot.

- **Religious Relics:** The discovery of a powerful or sacred relic could become a central plot point, with both humans and aliens vying for control.

- **Moral and Ethical Dilemmas:** Present dilemmas such as whether to respect alien religious laws that conflict with human survival needs or moral principles.

### Practical Tips for Integrating Religious and Social Themes

**12. Realism and Sensitivity:**

- **Respect and Sensitivity:** Handle religious themes with care, ensuring respect for diverse beliefs.

- **Depth and Complexity:** Portray both the positive and negative aspects of religion and show variability within each belief system.

**13. Player Involvement:**

- **Character Arcs:** Encourage players to develop their characters’ relationships with religion and alien cultures.

- **Choice and Consequence:** Make sure player choices regarding religious and social interactions have meaningful consequences.

By integrating these elements, you can create a rich, multifaceted campaign that explores the complexities of religion, culture, and survival on an alien world. This setup provides a fertile ground for storytelling and character development, making for an engaging and thought-provoking experience for your players.