The Question:
Judaism teaches “yeridat hadorot” — each generation is spiritually lower than the last. If so, why does our low generation merit bringing the ultimate Geula?

The 4 classic answers:

1. Midget on the Shoulders of Giants
– Idea: We’re smaller, but we stand on top of all previous generations.
– Result: We can reach higher than even the greatest earlier generations, because their work lifts us.

2. Cumulative Merit
– Idea: Every mitzvah from the beginning of time — Adam HaRishon until today — builds one account.
– Result: Our generation inherits the entire spiritual bank. No earlier generation had access to that full sum. We have more accumulated good than anyone before us.

3. Tailored Missions
– Idea: G-d gives each generation a job it can handle.
– Result: Early generations got massive spiritual tasks, so they needed huge souls. The final tasks are tiny by comparison, so our lower level is exactly enough to finish.

4. Darkness makes Light Stronger
– Idea: The value of a mitzvah depends on the difficulty.
– Result: Because we keep Torah in a world of spiritual darkness and opposition, our mitzvos have unique power. That merit qualifies us for the final Geula.

(Hisvadayus 3:1291 5742, Likutei Sichos 1:247, Hisvadayus 2:617)