Under the rule (spiritual rule) of the Imam al-Zaman [Hazrat Mahdi (as)] peace and security will spread to all parts of the world. 

Surah Nur, verse 55; Yanaabee' al-Mawaddah, p.  406; Mo'jam-o-Ahaadees al-Imam al-Mahdi (a.s.), Vol. 1, p. 548


 
Hypocrites and evil-doers will disappear [in the time of Hazrat Mahdi (as)].

E'qd al-Dorar, p. 195





 
 
Corruption, irregularities and disorder will be completely resolved [in the time of Hazrat Mahdi (as)].

Muntakhab al-Asar, p. 157


 
 
The streets will even be safe at night [in the time of Hazrat Mahdi (as)].

Surat as-Saba’, verse 18; Bihar al-Anwar, Vol. 52, pp. 338 and 345; Mikyaal al-Makaarem, Vol. 1, p. 46





 
 
[In the time of Hazrat Mahdi (as)] people will not fear for their lives or property.

Bihar al-Anwar, Vol. 52, p. 385; Vol. 53, p. 86; Al-Malaahem wa al-Fetan, Ch. 204, p. 97; Mo'jam-o-Ahaadees al-Imam al-Mahdi (a.s.), Vol. 1, p. 548; Hilyah al-Abraar, Vol. 2, p. 635 Narrated from Dalaael al-Imaamah; Mikyaal al-Makaarem, Vol. 1, pp. 101 and  247; Iqdud Durar, p. 159