It's been an important part of law for a long time, although there's a tendency to explicitly avoid it in legislative efforts in the US since the '60s and the advent of MPC (https://en.wikipedia.org/wiki/Model_Penal_Code)
It's been an important part of law for a long time, although there's a tendency to explicitly avoid it in legislative efforts in the US since the '60s and the advent of MPC (https://en.wikipedia.org/wiki/Model_Penal_Code)