Methods of generating and optimizing stabilized (e.g., stapled and/or stitched) anti-microbial peptides (StAMPs) for the prophylaxis and treatment of antibiotic-resistant (e.g., colistin-resistant, methicillin resistant, meropenem-resistant) bacterial infections (e.g., Gram-negative, Gram-positive), and methods for using such peptides for experimental investigation, livestock management, management of crops/trees/plants, and/or therapeutic benefit. Also featured are methods for reducing renal toxicity of a StAMP.