Debates around the greatest of all time in sport can often be as polarising as any other.

Now that LeBron James has surpassed Kareem Abdul-Jabbar to stand at the top of the NBA's all-time leading scoring chart though, it seems appropriate to review the case for the 38-year-old to be considered the greatest basketball player of all time.

In what has without question been at least one of the best careers ever seen, James has four NBA championships to his name, as well as four Finals MVPs, four NBA MVPs, 19 All-Star selections and three All-Star MVPs. His 13 All-NBA First Team selections are two more than anybody else.

Enough to make any doubter's eyes water.

Added to that, after overtaking Kareem on Tuesday, he not only stands alone atop the all-time scoring list, but has a real opportunity to pull away and perhaps even go past 40,000 before hanging up his sneakers. He has long been the playoff scoring king, with his 7,631 playoff points already 1,644 clear of second-placed Michael Jordan.

It isn't just racking up the points, he has also passed on his fair share of assists, recently pushing past Steve Nash on that all-time leaderboard, with James now fourth for NBA assists.

As the first pick of the 2003 NBA Draft, it was hardly surprising that James impressed from the start with the Cleveland Cavaliers, averaging 20.9 points per game (PPG) in his debut season from 79 games.

It was the 2005-06 season where he really exploded, though, averaging 31.4 PPG in the regular season, which remains his highest ever for a campaign, before recording 30.8 PPG in the playoffs, where the Cavs were eliminated in Game 7 of the Eastern Conference semi-finals by the Detroit Pistons.

James took Cleveland to the postseason for five straight campaigns, agonisingly losing the 2007 Finals to the San Antonio Spurs, before taking the mantel again in 2009 as he put up 35.3 PPG in 14 playoff outings before more Conference final heartbreak against the Orlando Magic.

The television event titled 'The Decision' was controversial, though undoubtedly captivating as James dramatically revealed he was leaving the Cavs for the Miami Heat in 2010.

However, it turned out to be the catalyst for him to reach the next step as he was immediately surrounded by more talent in Miami, and before long, much-deserved silverware.

Linking up superbly with Dwyane Wade and Chris Bosh, James reached the Finals every year in Florida, winning his first championship in 2012, before following it up in 2013 with another.

His numbers were slightly lower at the Heat than they had been in Cleveland, though that perhaps owed to the fact that when deciding to join Miami, he was joining forces with arguably the league's second-best player at the time in Wade.

James' first title win in 2012 saw him average 30.3 PPG during the postseason, and led the way as he got some revenge on the Spurs in 2013, excelling in Game 7 to win his second championship.

In 2014, James came back to Cleveland with the Ohio-born star's desire to take his team to the promised land for the first time, and he did just that.

Just as he had in Miami, James went to the Finals every year of his second spell with the Cavaliers – resulting in eight consecutive Finals appearances – and every year they played against the dominant Golden State Warriors.

After losing 4-2 in 2015, they returned to get revenge in 2016 as James starred on their way to an almost Hollywood-ending win against the Warriors, securing their first NBA championship after coming back from a 3-1 deficit against a team that set the record for the best regular season ever at 73-9.

They were unable to repeat the trick as the Warriors, with the addition of Kevin Durant, beat them in both the 2017 and 2018 Finals, but reaching four Finals in a row was still more than Cavs fans could have realistically expected.

Unfortunately for them, James was getting itchy feet again.

James had a solid enough start to life in Los Angeles, posting 27.4 PPG for the Lakers in 2018-19, though injury issues sustained by him and several of his new team-mates led to a wobbly season, and therefore, no postseason for the first time for James since 2005.

Inevitably, he came roaring back the following year and in spite of the chaos caused by the COVID-19 pandemic, James and the Lakers returned to win the "bubble championship", the fourth title of his career with a third different team. In doing so, he became the only player in NBA history to win Finals MVP with three franchises.

However, the 2020-21 campaign was one to forget as James recorded his lowest PPG for a season (25.0) since his rookie year, before the Lakers were dumped out of the playoffs in the first round by the Phoenix Suns.

Was it all over for LeBron? Not likely. He responded to that setback by scoring 1,695 points in just 56 games last season at an average of 30.3 PPG, his best regular season return since 2005-06.

James also reached a notable landmark last March, becoming the first player in NBA history to record 10,000 assists and 10,000 rebounds in a career.

Unfortunately for him, his team-mates were unable to match those efforts and the Lakers again failed to even make the playoffs, which could be why they were so desperate to find the funds to tie James' immediate future down as he was given a bumper contract to make him the highest-paid player in the league.

LeBron has thrived again this season, averaging 30.0 PPG from 43 appearances as he tries to drag the Lakers back to the playoffs.

Arguments can of course be made for the player with the most NBA titles Bill Russell, or the man whose name is synonymous with so many NBA records Wilt Chamberlain, while Lakers legends Abdul-Jabbar and Kobe Bryant have to be in the conversation also.

However, ask most people who they believe to be the greatest of all time and you wil have to go a long way to find someone who doesn't immediately blurt out the name of Michael Jordan.

The Chicago Bulls icon was a five-time NBA MVP, six-time NBA champion, six-time NBA Finals MVP, 10-time All-NBA First Teamer, 14-time NBA All-Star; won 10 scoring titles and retired with the NBA's highest scoring average of 30.1 PPG.

Jordan was a force of nature who always seemed to raise his game beyond others exactly when his team needed it, while James has experienced more disappointment in clutch scenarios.

He has also taken his team with him to ultimate success more than once, and arguably teams that had more limitations than Jordan's best times at the Bulls.

When you consider that Jordan is also in the argument for the greatest sportsman of all time, it is testament to James that he's even in the conversation.

"It's not heavy. I'm not going anywhere. I'm going to be in this league for at least a few more years," James recently said as he closed in on Kareem's record.

Which is ominous for the rest of the league, quite frankly.

Is he the greatest of all time? As with most discussions on the topic, it probably doesn't matter.

James has scored more points than anyone else to ever compete in the NBA, and that is undisputed.