Why is gravity a strong force?

Related questions

• Does gravitational force get weaker with distance? How strong is gravitational force?
• How does cosmic background radiation change the universe?
• How does gravity affect the universe?
• What does red shift mean?
• When looking at a spectrum of light from a star, how can we tell that the light has undergone...
• What is redshift and blueshift?
• What is the redshift of the CMB surface?
• What is the redshift of the Andromeda galaxy?
• How do scientists know that there is redshift from a star going away and EM waves have changed lengths?
• How does redshift differ from blueshift?