It's difficult to definitively say which type of volcano is the *most* destructive, as it depends on what you mean by "destructive." Here's a breakdown of different aspects of volcanic destruction and the types most associated with them:

Most Powerful Eruptions (Explosive):

* Calderas: Formed by the collapse of a volcano's magma chamber, these eruptions are often the most powerful, releasing vast amounts of ash and gas. Examples include Yellowstone and Toba.

* Supervolcanoes: These are the largest caldera-forming eruptions, capable of causing global climate change and widespread devastation.

Most Damaging to Infrastructure:

* Stratovolcanoes (Composite): These tall, cone-shaped volcanoes are known for their explosive, viscous lava flows that can destroy entire towns and cities. Mount Vesuvius is a famous example.

Most Likely to Cause Tsunamis:

* Submarine Volcanoes: These volcanoes erupt beneath the ocean surface, and their explosions can displace vast amounts of water, triggering destructive tsunamis.

Most Impactful on Climate:

* Large-scale Eruptions (Any Type): Volcanic eruptions can inject massive amounts of ash and gases into the atmosphere, blocking sunlight and causing global cooling. The 1815 eruption of Mount Tambora, for instance, caused the "Year Without a Summer."

Overall:

While it's hard to pick a single "most destructive" type, calderas and supervolcanoes are generally considered the most powerful and capable of causing the greatest damage.

Important Note: It's important to remember that *any* active volcano can pose a significant threat, and the destructive potential depends on factors such as the size and frequency of eruptions, proximity to human populations, and preparedness measures in place.