What are the causes of building collapse?

It could be one off or any combination of a long list:

• Inappropriate material. Substandard or wrong.
• Bad workmanship. Incorrect concrete or mortar mixes.
• Concrete and steel in the required units of structural CMU omitted.
• Foundation not matching the loads and founding conditions. Bad design / no design.
• Rot and /or insect damage on timber buildings.
• Reinforcement omitted.
• No allowance of movement. Bad design.
• No shear / buttresses walls. Bad design.
• Bad or not stormwater control, eroding the foundations.
• Trees / roots damaging buildings. Bad /no maintenance.
• Roof tie downs insufficient.
• No slip joint inbetween concrete and supporting brickwork. This usually just causes cracks.
• Natural catastrophes.
• Man induced catastrophes.

Thanks for the invitation

Not to take precautions and follow the technical engineering standards at - 1

Neglect of implementation and the receipt of excavation - 2 

 Neglect implementation of Back fill - 3

Construction in areas prone to collapse without taking this into consideration during the design - 4

Inadequacy of the structural and architectural design - 5

1-mistakes in calculation

2- the nature of the ground

3- strong earthquake

4- fire in the buildings dosn't resist fire

Taking the wrong considerations (soil report - rebar properties - properties of concrete)

design fault  ( foundations - coulmns - slabs) 

The end of the lifespan of building

natural disasters

causes of building collaps:

demolition trough explosives.

faulty design (look at google at edificio space Medellin: design faults!)

earthquakes, maybe you can also put that under faulty design if you knew where the design is built.

soil liquification , due to earthquakes

hurricanes and typhoons, maybe you can also put that under faulty design if you knew where the design is built.

But also , modifications in the design during building phase, very dangerous if you do not follow all the steps

The Passage of time is one reason. Buildings also collapse due to weak foundations. Earthquakes, hurricanes and other natural disasters can also damage the structure of the buildings and cause it to collapse. Bombings or demolition of buildings is also other reasons

....................I agree with all up ..................

Thanks for your invitation

I'm sorry this is not in my speicalist, i can say, I agree with the experts.