Why did the Titanic really sink?

1. Material and design failure

1.1. Rivets

1.1.1. bad quality

1.2. Watertights Compartments

1.2.1. not enough high

1.3. Big First Class

1.3.1. too big

1.4. Lifeboats

1.4.1. not enough

2. Human Fault

2.1. Captain E.J Smith

2.1.1. ignored iceberg warnings

2.2. Bruce Ismay

2.2.1. wanted to make a six day crossing

2.3. Thomas Andrews

2.3.1. did not make the compartments high enough

2.4. The lookouts

2.4.1. did not notice the iceberg in time

3. Weather and environmental conditions

3.1. Iceberg

3.1.1. there were dozens

3.2. "Mirage"

3.2.1. new theory, special weather condition