This is really a comment rather than an answer, but it got too long to put in a comment.

Flatness problem:

On Flatness problem, Inflation etc

Why does inflation (the inflaton field) push Omega down closer to zero (flatten the universe)?

How does inflation drive Ω close to 1?

http://en.wikipedia.org/wiki/Flatness_problem

Monopoles:

How does Inflation solve the Magnetic Monopole problem?

http://en.wikipedia.org/wiki/Monopole_problem#Magnetic-monopole_problem

Horizon problem:

I couldn't find a match question on this site but see http://en.wikipedia.org/wiki/Horizon_problem.

Each of the three subjects, the flatness problem, the horizon problem and the monopole problem is a long answer in it's own right. I'd suggest you have a look at the links above and ask a new quaestion about any specific issues you don't understand.

This is really a comment rather than an answer, but it got too long to put in a comment.

Flatness problem:

On Flatness problem, Inflation etc

Why does inflation (the inflaton field) push Omega down closer to zero (flatten the universe)?

How does inflation drive Ω close to 1?

http://en.wikipedia.org/wiki/Flatness_problem

Monopoles:

How does Inflation solve the Magnetic Monopole problem?

http://en.wikipedia.org/wiki/Monopole_problem#Magnetic-monopole_problem

Horizon problem:

I couldn't find a match question on this site but see http://en.wikipedia.org/wiki/Horizon_problem.

Each of the three subjects, the flatness problem, the horizon problem and the monopole problem is a long answer in it's own right. I'd suggest you have a look at the links above and ask a new quaestion about any specific issues you don't understand.

Re flatness problem:

On Flatness problem, Inflation etc

Why does inflation (the inflaton field) push Omega down closer to zero (flatten the universe)?

How does inflation drive Ω close to 1?

http://en.wikipedia.org/wiki/Flatness_problem

Re monopoles:

How does Inflation solve the Magnetic Monopole problem?

http://en.wikipedia.org/wiki/Monopole_problem#Magnetic-monopole_problem

Re the horizon problem, I couldn't find a match question on this site but see http://en.wikipedia.org/wiki/Horizon_problem.

Each of the three subjects, the flatness problem, the horizon problem and the monopole problem is a long answer in it's own right. I'd suggest you have a look at the links above and ask a new quaestion about any specific issues you don't understand.

This is really a comment rather than an answer, but it got too long to put in a comment.

Flatness problem:

On Flatness problem, Inflation etc

Why does inflation (the inflaton field) push Omega down closer to zero (flatten the universe)?

How does inflation drive Ω close to 1?

http://en.wikipedia.org/wiki/Flatness_problem

Monopoles:

How does Inflation solve the Magnetic Monopole problem?

http://en.wikipedia.org/wiki/Monopole_problem#Magnetic-monopole_problem

Horizon problem:

I couldn't find a match question on this site but see http://en.wikipedia.org/wiki/Horizon_problem.

Each of the three subjects, the flatness problem, the horizon problem and the monopole problem is a long answer in it's own right. I'd suggest you have a look at the links above and ask a new quaestion about any specific issues you don't understand.