Which fundamental force has the longest range?

Gravity is the only fundamental force that reaches across infinite distance without diminishing to zero. Its influence extends between planets, stars, galaxies, and even galaxy clusters. In everyday life it is weak compared with the electromagnetic force, but because all mass-energy gravitates and gravity is always attractive, it dominates the large-scale structure of the universe. Isaac Newton first described gravity mathematically in the 17th century, and Albert Einstein later explained it as the curvature of spacetime. No known shielding mechanism can block gravity.