Abatement of Crime: IPC mein kya hai yaar?

Maine abhi till date IPC ka chapter 4: Criminal Conspiracy aur chapter 7: Offences Affecting the Security of the State padha hai, lekin abatement of crime samajh nahi a raha. Sab textbooks kehta hai ki yeh woh hai jab koi aadmi kisi crime ko karne se rokta hai ya isse fail karata hai, lekin bas yeh baat kaafi nahi hai. Kya yeh aadmi ko pachot pakadne se khatre mein padhne ka haq hai, ya phir yeh koi badi baat hai? Ek realsitik example dohein kya chal raha hai, aur kisse case mein istemaal kiya gaya hai, toh meri samajh badh jaayegi.