Physics frameworks lead into each other as follows:
Mechanics leads to Statistical Mechanics
Statistical Mechanics leads to Thermodynamics
Then there is the quantum frameworks, which in their limiting case become the corresponding classical ones
Quantum Mechanics, limiting case Mechanics
Quantum Statistical Mechanics, limiting case Statistical Mechanics
Then there is Quantum Field theory, which developed as a way to calculate crossections and is appropriate for particle physics, i.e. small dimensions, high energies.
Mechanics leads to Neuton's Gravity Theory
General Relativity has a limiting case Neuton's Gravity Theory
There is no consistent quantum gravity outside of String Theory, which is the frontier being studied now.
String Theories have as limiting cases General Relativity and Quantum Field Theory.
All capitalized theories are "physics conceptual frameworks used for calculations"