Well it varied according to time and place but,
<span>Many military personnel who opposed their regime would be killed and political opponents and thousands of others who spoke out against them were sent to the Gulag, a high security labor prison where many died during or shortly after release.</span>
Answer:
Two Weeks
Explanation:
Major Depressive Disorder or simply Depression is a serious mental disorder characterised by periods of low, sunken moods, withdrawal and lack of interest in everyday activities like talking, eating, socializing.
The will to stay alive begins to gradually ebb as the victim is no longer interested in life and begins to withdraw from people.
The victim may also start hallucinating by seeing or hearing things that do not exist.
However for a person to be confirmed as depressed, the symptoms must have lasted for a minimum period of two weeks
"To accommodate for lack of dependable rainfall" would be the best option as to why the ancient Chinese organized large groups of people to build and maintain irrigation systems, since when rainfall would not come for long periods of time, the crops would likely die without proper irrigation.
