dd637b1b_Particles_vs__strings__particles
[topic] supersymmetry [strings] Known string theories have serious difficulties already at low orders of perturbation in the absence of supersymmetry, so string theory predicts supersymmetry. [particles] 
The standard calculational method for particles uses an approximation method ("perturbation") that involves adding correction terms. When the infinite number of terms is summed to find an exact answer, predictive power is lost in the absence of supersymmetry. Thus, particle theory predicts supersymmetry.
Particles vs. strings
particles